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    By Eugene·Updated on September 10, 2026

    Reward Mine, California, a premier oxidized lead-copper locality famed for electric blue caledonite in quartz pockets, with linarite, cerussite, and rare arsen…

    Key facts

    Locality
    Reward Mine
    Country
    USA

    Reward Mine, USA

    Overview

    Reward Mine is one of California’s most rewarding oxidized lead-copper localities in the literal collector’s sense: a gold-silver mine whose specimen fame rests not on native gold, but on intensely colored supergene minerals lining cavities in quartz and altered carbonate rock. The mine lies on the west flank of the Inyo Mountains above Owens Valley, in the Russ Mining District of Inyo County, California, east of Manzanar and north-northeast of Lone Pine. Historically it is tied to the Brown Monster, Eclipse, Reward, Ruth, Graham-Jones, Hidden Treasure, Telescope, and related claims, a tangle of names that reflects more than a century of claim consolidation, reworking, and literature usage.

    The deposit is a quartz-vein system in intensely folded Carboniferous limestone and associated metasedimentary rocks, locally metamorphosed by nearby diorite into tremolite-bearing marble and lime-silicate hornstone. The ore was mined principally for gold and silver, with lead and copper as important accessory metals. That metal mix, combined with dry underground conditions and deep oxidation, produced the mine’s distinctive collector assemblage: caledonite, linarite, brochantite, leadhillite, cerussite, anglesite, chrysocolla, wulfenite, and a suite of rare lead-copper arsenates, phosphates, selenites, selenates, bismuth oxyhalides, and silver halides.

    For collectors, Reward is above all a caledonite locality. The best pieces are small but electric: blue to blue-green prismatic, flattened, striated crystals tucked into quartz vugs, often contrasted by darker royal-blue linarite, green brochantite, white cerussite, colorless to white quartz, and the occasional yellow bismuth-bearing perite. Reward caledonite can be microscopic, but the important modern pockets yielded sharply crystallized miniatures and thumbnails with crystals large enough to be visually arresting without magnification. Fine pieces have appeared in major shows and specialist collections, and the locality is repeatedly cited as one of the significant American sources of specimen-quality caledonite.

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    The mine’s importance is heightened by its setting. Reward Gulch, now commonly mapped as Eclipse Canyon, cuts through a broken, slickensided shear zone. Knopf’s early geological work emphasized that the Reward and Brown Monster veins may not be two unrelated structures so much as offset or related segments in a faulted vein system. The mine’s collector minerals are therefore not random dump curiosities; they are the visible, crystallized residue of a dry, oxidized, structurally complicated Au-Ag-Pb-Cu-Zn vein environment in contact-metamorphosed carbonate terrain.

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    On this page

    • Overview
    • Featured Specimens
    • Locality Information
    • Notable Minerals
    • Caledonite
    • Brochantite
    • Linarite
    • Quartz
    • Collector Notes
    • Stories & Field Notes
    • Mineralogical Records & Publications
    • Videos & Media
    • Further Reading & External Links

    Locality Information

    Search for specimens: View all specimens from Reward Mine, USA

    Reward Mine is a former Au-Ag-Pb-Zn-Cu mine in sec. 3, T14S, R36E, Mount Diablo Meridian, in the Russ Mining District on the west base of the Inyo Mountains. The locality is east of the old settlement of Reward and near Manzanar, with published locality descriptions placing it roughly 13 miles northeast of Lone Pine, about 2 miles east of Manzanar Station, and on or near Manzanar-Reward Road. Elevation figures vary by reference because the Reward-Brown Monster complex covers a vertical spread of workings and claims; MRDS lists the Reward Mine at about 1,219 meters, while collector-locality descriptions commonly refer to the mine area around 4,000 to 4,500 feet.

    Geologically, the mine belongs to the western Inyo Range’s folded Paleozoic carbonate and metasedimentary belt. The country rock around the mine is dominantly Carboniferous limestone, with slate and other metasedimentary rocks nearby and Mesozoic granitic or dioritic rocks in the broader mapped area. A diorite body is exposed a few hundred yards east of the mine at roughly 5,000 feet elevation, and its thermal influence produced tremolite-bearing marble and dense lime-silicate hornstone around the vein system. Knopf described a conspicuous diorite sill, about 10 feet thick and about 50 feet above the Reward vein, as a useful marker for understanding local faulting.

    The ore bodies are quartz veins and vein shoots controlled by bedding planes, faults, and the Reward Gulch shear zone. MRDS describes the general ore-body form as pinch-and-swell, with strikes recorded as N70W and N40W, dips of 25NE and 40NE, and a thickness of about 3.66 meters. The Brown Monster vein was described as 4 to 12 feet thick, traceable on the surface for about 1,000 feet northwest of Reward Gulch, with ore shoots 100 to 200 feet long and averaging about 4 feet thick. The Reward vein was reported as about 6 feet thick, with an ore shoot 150 to 300 feet long averaging about 6 feet thick. In the mine, the ore was largely coarse white quartz, mostly barren of sulfides except for local blebs or bunches of galena, pyrite, chalcopyrite, and sphalerite.

    Oxidation is the key to Reward’s specimen mineralogy. The underground workings were described as dry, and oxidation extended down to the lowest levels, even though some larger masses of galena on upper levels escaped alteration. The oxidized suite includes limonite, ferruginous jasper, chrysocolla, cerussite, anglesite, linarite, caledonite, brochantite, wulfenite, leadhillite, and other late-stage minerals in cavities and replacement zones. The face of the fifth level was specifically noted for secondary replacement products of country rock enclosed in the vein, including calamine, hydrous iron oxides, ferruginous jasper, chrysocolla, and wulfenite. Well-formed orange-yellow wulfenite was reported from vugs in quartz at the north incline, and smithsonite was noted in radial groups up to about half an inch across.

    The mining history is unusually tangled because the same ground appears under several names. The Eclipse was reportedly discovered in 1860 along with the Union and Ida, with work beginning in 1862 by R. S. Wigham. By 1871, according to later historical summaries, the Eclipse had been sold and renamed the Brown Monster. The Reward name came into use through the Reward Consolidated Gold Mining Company, and the mine literature continued to distinguish the Reward vein south of Reward Gulch from the Brown Monster vein north of the gulch. The broader complex has also been associated with the Ruth, Graham-Jones, F. D. Roosevelt, Golden West, Hidden Treasure, Hirsch, and Telescope groups.

    The mine was worked steadily in the late nineteenth and early twentieth centuries, with the Russ District’s veins discovered in 1878 and worked steadily until 1914. Reward was active again in the 1930s and 1940s, with additional work later. A six-stamp mill was replaced by a 30-stamp mill early in the Brown Monster period; in 1905 a 20-stamp mill was erected closer to the workings, and a tram was installed to move ore down to the mill. In 1911 the mine and plant were overhauled, including construction of an electric transmission line across Owens Valley. The mine closed in spring 1912 pending a change of ownership, then saw intermittent work from 1913 to 1936, with some ore shipped to the Tropico mill at Rosamond. Golden Queen Mining Company leased and explored the property from November 1940 to April 1942, driving several hundred feet of drifts and crosscuts and carrying out diamond drilling, though the results were not favorable. T. L. Bright of Independence operated the property from 1936 through 1951 except during the Golden Queen interval.

    The physical workings were extensive. MRDS records the Reward No. 1 tunnel as driven 1,200 feet N55E, 650 feet to the vein, then drifting southeast 800 feet. The No. 2 tunnel level, about 50 feet higher, was driven southeast 800 feet; No. 3 was 700 feet long, No. 4 was 600 feet, No. 5 was 400 feet, and No. 6 was 300 feet. Ore shoots were stoped from the No. 2 tunnel level to the surface. The Brown Monster incline shaft followed a N40E fault to a depth of 300 feet, with levels at 60, 96, 200, and 250 feet. On the ridge north of the Brown Monster incline shaft, about 500 feet higher than the collar, the vein was exposed for 500 feet, and three incline shafts were sunk on the vein to depths of 30 and 90 feet. Modern observers describe a broad complex of adits, shafts, ore bins, rails, tram remains, mill structures, and open stopes scattered across the canyon walls.

    Production figures vary by source and by whether only recorded shipments or broader district estimates are being considered. MRDS notes 1935-1936 Au ore with reported grades around $25 per ton gold and 1.5-2 percent lead in one entry, and for 1911-1952 gives byproduct figures of 33,800 pounds of copper and 267,800 pounds of lead. A production comment in the same record states that ore shipped and treated at Tropico reportedly carried $25 to $40 per ton in gold and that total production exceeded $300,000 according to Goodwin. A later locality summary gives approximately $600,000 in gold, silver, lead, and copper ore between 1889 and 1951. These numbers should be read as historical mining estimates rather than a single reconciled modern reserve statement.

    Specimen production is best known from old cabinet material and modern field-collector finds. Early literature already recognized linarite and caledonite as rare oxidized lead-copper sulfates at the mine. The strongest collector material appears to have come from discrete oxidized vugs and pockets rather than broad ore runs: blue caledonite in quartz cavities, linarite coatings and flattened prisms, brochantite with linarite and cerussite, and small but sharp rarities such as perite, arsentsumebite, tsumebite, mottramite, and schmiederite. A notable modern collecting episode involved Keith Wentz specimens appearing at Tucson in 2010, where large free-standing caledonite crystals on matrix and aesthetic caledonite-linarite associations drew strong collector attention. Another collecting episode, reported from the Bay Area show circuit, involved Rick Kennedy working the mine with other collectors and finding a dark-blue caledonite zone with bright yellow perite.

    Collecting access today should be treated as restricted and uncertain unless personally verified. Published locality records describe the Reward Mine as being on private patented land, while later field and photo essays note that some parts of the broader claim area have remained private and some parts may have reverted to Bureau of Land Management jurisdiction. Old active-claim notes are not a substitute for present-day permission. The site also contains numerous open adits, inclined shafts, vertical shafts, rotten timbering, loose talus, and unstable stopes. Serious collectors should confirm current land ownership and claim status, obtain permission where required, and avoid underground entry.

    Notable Minerals

    Caledonite

    Caledonite is the signature Reward species, occurring as blue to blue-green prismatic to flattened striated crystals in quartz-lined vugs and oxidized lead-copper zones, commonly with linarite, leadhillite, quartz, cerussite, brochantite, chrysocolla, and locally perite; most crystals are micro to a few millimeters, but the finest modern specimens have shown free-standing crystals approaching or exceeding the centimeter scale, and even smaller pieces can be superb when the crystals are glassy, saturated, undamaged, and isolated against white quartz or dark-coated matrix. Ordinary Reward caledonite tends to be massive patches, tiny crusts, or crystals hidden in narrow cavities; the desirable pieces show sharp individual crystals with strong color contrast, good coverage, and convincing locality character—especially blue-green caledonite paired with deeper blue linarite or yellow perite from the richer oxidized zones.

    Brochantite

    Brochantite from Reward is less famous than caledonite or linarite but is an important part of the mine’s oxidized copper suite, occurring as green acicular to prismatic crystal aggregates, crusts, and microcrystalline coatings with linarite, caledonite, cerussite, anglesite, and chlorargyrite in the same oxidized lead-copper cavities. Fine examples are usually miniature to micro in scale; one documented Reward-Brown Monster specimen shows thick interconnected brochantite crystals making up a 5 cm-plus piece, while collector micromount material includes brochantite with cerussite and dark chlorargyrite in fields of view only a few millimeters across. Better Reward brochantite has distinct crystallization and a fresh saturated green color rather than dull powdery coating, and association pieces with blue linarite are more visually and locality-significant than isolated green crusts.

    Linarite

    Reward linarite forms the deep royal-blue counterpoint to caledonite, appearing as flattened prismatic crystals, microcrystalline to crystalline layers, and rich electric-blue coatings on matrix, commonly with caledonite, cerussite, leadhillite, quartz, brochantite, anglesite, chrysocolla, chlorargyrite, and wulfenite. Early geological descriptions already singled out “deep azure-blue” linarite in the oxidation products, and modern dealer and auction records show small-cabinet pieces with flattened prismatic linarite crystals on matrix, as well as larger linarite-caledonite plates where blue linarite coats aqua-green caledonite. The best Reward linarites are judged by saturation, sparkle, undamaged crystal edges, and contrast—especially when the darker linarite remains visibly crystalline rather than amorphous, and when it sits with caledonite rather than disappearing into a mixed blue-green crust.

    Quartz

    Quartz is the structural and aesthetic matrix mineral of Reward: the ore itself is predominantly coarse white quartz, locally vuggy, and many of the mine’s best secondary lead-copper specimens are displayed on quartz crystals or quartz-lined cavities rather than on massive limonite. Reward quartz can be white, colorless, or dark-coated by iron oxides and chrysocolla, and collectors value it less as a stand-alone species than as the stage for caledonite, linarite, cerussite, chrysocolla, wulfenite, and other secondaries; one documented specimen consists of caledonite perched in a nest of quartz crystals with a dark coating and a thin chrysocolla film, while early mine descriptions record orange-yellow wulfenite in quartz vugs at the north incline. A good Reward quartz specimen is therefore one that preserves open cavity geometry and color contrast, with sharp secondary minerals sitting cleanly on the quartz rather than smeared across broken vein material.

    Beyond those four species, Reward is a remarkably diverse oxidized Pb-Cu-Ag-Zn locality. Documented minerals include anglesite, cerussite, leadhillite, galena, chalcopyrite, sphalerite, pyrite, gold, silver, chlorargyrite, bromargyrite, chrysocolla, malachite, azurite, cuprite, goethite, calcite, diopside, tremolite, hemimorphite, smithsonite, wulfenite, mimetite, pyromorphite, vanadinite, conichalcite, duftite, beudantite, corkite, arsentsumebite, tsumebite, mottramite, perite, kettnerite, bismoclite, bismuthinite, bismutite, geochronite, pyrargyrite, allophane, kaolinite, jarosite, plumbojarosite, chalcanthite, gypsum, fornacite, schmiederite, and munakataite. No valid mineral species appears to have Reward as its type locality, but the mine’s rare-mineral importance is real: perite and kettnerite reflect the bismuth-bearing side of the assemblage, arsentsumebite/tsumebite/mottramite document the arsenate-phosphate-vanadate chemistry of the oxidized zone, and schmiederite plus munakataite place Reward among a small group of localities with noteworthy lead-copper selenium-bearing secondary minerals.

    Collector Notes

    Reward specimens are often small, delicate, and visually subtle until properly lit. The most common condition issue is not catastrophic breakage but incomplete crystallization: a piece may be honestly labeled caledonite or linarite and still consist mostly of massive blue-green material with the real crystals hidden in a tiny vug. Good photographs under macro lighting can overstate visual impact, so collectors should check crystal size, field of view, and whether the colored area is crystalline, massive, or amorphous.

    Authentication problems are mostly matters of identification and locality precision rather than documented widespread fakery. Caledonite, linarite, brochantite, chrysocolla, azurite, and malachite can all present as blue-green coatings in oxidized lead-copper material, and Reward labels are sometimes broadened to “Brown Monster-Reward,” “Reward Mine,” or simply “Inyo County.” Those names may be historically defensible for the complex, but the best labels specify Reward Mine or Brown Monster-Reward Mine, Russ Mining District, Inyo Mountains, Inyo County, California. For high-value pieces, especially caledonite-linarite associations or rare selenium-bearing species, analytical confirmation or strong old provenance is worth having.

    The most convincing Reward caledonite pieces show glassy to gemmy prismatic crystals, often flattened and striated, with the characteristic bright blue to blue-green color. Linarite should be a deeper, more royal blue and may form flattened prismatic crystals or lustrous microcrystalline layers. Brochantite is green and commonly acicular or aggregated. Because many specimens are mixed, a single blue-green area may contain several species; avoid paying caledonite prices for unverified chrysocolla or amorphous copper staining.

    Handling is straightforward but should be gentle. Caledonite has low hardness, and linarite/brochantite crystal sprays are easily abraded. Avoid ultrasonic cleaning, acids, aggressive brushing, and prolonged soaking. Many Reward pieces are on quartz and iron-oxide matrix with delicate secondary minerals in protected recesses; dust removal is best done with air or a very soft brush used sparingly. Because the assemblage includes lead and copper minerals, wash hands after handling, keep fragments away from children and pets, and do not use specimens in jewelry or lapidary work.

    Reward material is available but not abundant. Small linarite-caledonite plates and micromounts appear periodically, while strong caledonite miniatures are much scarcer and tend to move quickly among locality and species specialists. Modern market records show Reward specimens trading from modest prices for small or mixed pieces to substantially higher prices for saturated, sharp, aesthetic caledonite or linarite with provenance. The highest collector interest is in pieces that combine size, sharpness, color contrast, and a documented find or collection history—Keith Wentz, Rick Kennedy, Bob Reynolds, Jeff Lines, and other field-collector or specialist provenances add credibility and appeal.

    Stories & Field Notes

    The Reward story begins with a name problem. Reward, Brown Monster, Ruth, Graham-Jones, Eclipse, F. D. Roosevelt, Golden West, Hidden Treasure, Hirsch, and Telescope all appear in the locality’s orbit, and more than one collector has had to learn that a “Brown Monster” specimen and a “Reward Mine” specimen may be from the same historical mine complex rather than from separate, cleanly bounded collecting sites. Walt Margerum’s phrase “What’s in a Name?” was well chosen: the locality’s identity is a palimpsest of early discoveries, reorganized companies, renamed mines, and later collectors trying to reconcile labels with maps.

    The earliest thread is the Eclipse. According to Chalfant’s account as retold in later mineral-club literature, the Eclipse was discovered in 1860 along with the Union and Ida, but work did not begin until the summer of 1862 under R. S. Wigham. The delay was not a technical mining delay; it belonged to the violent frontier history of Owens Valley, where conflicts between white settlers and local Native people continued until 1866. That puts Reward’s origin in the same fraught landscape as Manzanar and the wider Owens Valley story: the mine is not just a mineral locality on a map, but a place layered over Indigenous dispossession, early mineral rushes, and later wartime incarceration nearby.

    By the early 1870s the Eclipse had changed hands, and one later history says that in 1871 the new owners renamed it the Brown Monster. The mine’s machinery tells the scale of their ambition. A six-stamp mill gave way to a 30-stamp mill, driven by waterpower generated from Owens River water. Then economics forced another adjustment: in 1905 a 20-stamp mill was built closer to the mine openings, and a tram was installed so ore could come down to the mill instead of being hauled away from the workings. In 1911 the mine and plant were overhauled again, this time with an electric transmission line 4 1/2 miles long strung across Owens Valley to bring in power. After a short run, the mine closed in spring 1912 while ownership changed yet again.

    The underground layout reads like a surveyor’s memory of a very physical place. The Reward No. 1 tunnel ran 1,200 feet N55E, reaching the vein at 650 feet, then drifted southeast another 800 feet. Above it came a ladder of levels—800, 700, 600, 400, and 300 feet long—separated by roughly 25-foot intervals. On the Brown Monster side, an incline shaft followed a fault down 300 feet, with levels at 60, 96, 200, and 250 feet. Ore was stoped for a 200-foot length east and west of the incline, averaging 6 feet wide. On the ridge above, 500 feet higher than the shaft collar, the vein cropped out for 500 feet; three small incline shafts were sunk along it, two to about 30 feet and one to about 90 feet. For a collector standing below the old ore bins and tram remnants, those numbers convert the hillside from scenery into a three-dimensional mine plan.

    One of the more memorable modern field descriptions comes from a photographic survey of the abandoned mine. The site is not one neat portal but a spread of adits, vertical and inclined shafts, rails, ladders, walkways, cable tram remains, and mill foundations scattered across Eclipse Canyon. The photographer noted an eight-level adit network along an inclined shaft, with about 500 feet of vertical relief from top to bottom. One vertical shaft was especially unnerving: rocks thrown down it reportedly fell and echoed for about 11 seconds. Another caption observes that, during operation, three men worked the mine while one more operated the mill at the canyon bottom. That small crew, set against the size of the workings, makes the old mine feel both industrious and lonely.

    The specimen stories are as good as the mining ones. At Tucson in 2010, Mineral Man reported stopping by Scott Klein’s room at the InnSuites and seeing an exceptional selection of caledonite and linarite from Reward, collected by Keith Wentz. The account conveys the jolt collectors feel when a quiet locality suddenly produces serious specimens: there were large, free-standing crystals perched on matrix, some in association with linarite, and one caledonite specimen was described as having a crystal “1cm+.” The report called it “perhaps one of the most impressive selection of caledonite specimens” the writer had seen offered for sale.

    Another show report from 2011 captured a different pocket. San Jose dealer Rick Kennedy had been working the Reward Mine with other Bay Area collectors and found a rich zone of dark-blue caledonite. What made that zone memorable was not only the caledonite but its contrast with bright canary-yellow perite, a bismuth-bearing rarity. The report pictured a 2 cm specimen with caledonite crystals to 0.4 cm and called out Kennedy’s “pride and joy,” a 5 cm cabinet specimen with a pod of massive and crystalline caledonite. In a locality where many excellent pieces are thumbnails and micromounts, a 5 cm cabinet specimen with a concentrated caledonite pod is a genuine event.

    A later show record adds one more useful collecting benchmark. In 2016, a 1.1 cm Reward caledonite in the Jeff Lines Collection, self-collected and photographed by Ben DeCamp, was shown in the Rockhound Record as the 2016 TGMS Best of Species Award specimen. That detail matters because Reward caledonite is often small: a thumbnail-scale specimen can still be important if the crystals are sharp, saturated, and balanced. The locality rewards scrutiny rather than size alone.

    Mineralogical Records & Publications

    • Adams, Paul M. (2010), “The Brown Monster and Reward mines, Inyo County, California,” The Mineralogical Record, 41(2), 175-193 — The key modern locality article for serious collectors, covering the Brown Monster-Reward complex, its history, geology, and specimen mineralogy.

    • Adams, Paul M. (2000), “Microminerals from the Reward Mine, Inyo Co., California,” Mineral News, 16(5) — A cited specialist reference for many of the microminerals documented from Reward.

    • Margerum, Walt (2005), “Minerals of the Reward Mine—Or What’s in a Name?” Bulletin of the Mineralogical Society of Southern California, March 2005 — A useful collector-oriented synthesis of Reward/Brown Monster names, history, geology, and a 38-mineral list then recognized for the mine.

    • Knopf, Adolf (1914), “Mineral resources of the Inyo and White Mountains, California,” U.S. Geological Survey Bulletin 540, pp. 116-119 — Early U.S. Geological Survey account of the mine’s geology, veins, oxidation, and secondary minerals.

    • Knopf, Adolf (1918), “A geologic reconnaissance of the Inyo Range and the eastern slope of the southern Sierra Nevada, California,” U.S. Geological Survey Professional Paper 110, pp. 121-122 — Expanded regional geological treatment including Reward’s vein geology and oxidized mineral suite.

    • Tucker, W. B., and Sampson, R. J. (1938), “Mineral resources of Inyo County,” California Journal of Mines and Geology, 34(4), 386-388 — Cited historical mine report for the Reward-Brown Monster workings and production period.

    • Norman, L. A., Jr., and Stewart, Richard M. (1951), “Mines and mineral resources of Inyo County,” California Journal of Mines and Geology, 47(1), 48-49 — Cited county mine-resource reference for the property.

    • Goodwin, J. G. (1957), “Lead and zinc in California,” California Journal of Mines and Geology, 53(3-4), p. 505 — Source cited in MRDS and Western Mining History for production comments and lead-zinc context.

    • Murdoch, Joseph, and Webb, Robert W. (1966), Minerals of California: Centennial Volume 1866-1966, California Division of Mines and Geology Bulletin 189 — Classic California mineral reference cited for Reward caledonite, linarite, and other species.

    • Pemberton, H. Earl (1983), Minerals of California, Van Nostrand Reinhold — Later California mineral reference cited for Reward caledonite, leadhillite, linarite, chrysocolla, and related species.

    • D’Arcy, Nicholas A., Jr. (1939), “Rocks and minerals outing to Owens Valley, California,” Rocks & Minerals, 14(3), 67-75 — Early collector-literature reference cited for Reward linarite and malachite.

    Videos & Media

    • ML00917, Miner’s Lunchbox, Vimeo — Short specimen video of a small-cabinet linarite and caledonite specimen from the Brown Monster-Reward Mine.

    • Reward Mine, Raise The Stakes Projects — Photo essay documenting the abandoned Reward/Brown Monster mine complex, including adits, rails, mill remnants, tram structures, shafts, and canyon setting.

    Further Reading & External Links

    • Mindat: Reward Mine, Reward, Russ Mining District, Inyo Mts, Inyo County, California — The most complete online locality index, with mineral list, aliases, coordinates, photo gallery, and references.

    • USGS/MRDS Reward Mine record via qvyshift — Detailed MRDS-derived record covering commodities, host rocks, ore-body form, workings, production comments, and references.

    • Western Mining History: Reward Mine — Readable MRDS-style summary with mine identity, district, commodity, workings, and historical references.

    • Western Mining History: Russ District — Concise district-level history and geology from Gold Districts of California.

    • USGS Bulletin 540: Mineral resources of the Inyo and White Mountains, California — Foundational early geological account of Reward’s quartz veins and oxidized minerals.

    • USGS Professional Paper 110: Geologic reconnaissance of the Inyo Range — Regional geological framework and mine description by Adolf Knopf.

    • Mineralogical Record, Vol. 41 No. 2, 2010 — Back-issue page for Paul M. Adams’s important article on the Brown Monster and Reward mines.

    • Mineralogical Society of Southern California Bulletin, March 2005 — Walt Margerum’s collector article on the mine’s names, history, geology, and mineral list.

    • Mineral Man Tucson 2010 report — Contemporary show report describing Keith Wentz’s significant Reward caledonite and linarite specimens.

    • Trinity Mineral Co. San Francisco 2011 report — Show report noting Rick Kennedy’s Reward caledonite zone with perite.

    • Marin Mineral: Caledonite and Linarite specimen NA817 — Dealer archive illustrating the small but vivid Reward linarite-caledonite style.

    • Mineral Auctions: Linarite from Reward Mine, ex Bob Reynolds Collection — Auction archive with specimen size, description, provenance, and realized price.

    • Mineral Auctions: Caledonite from Reward Mine — Auction archive documenting miniature Reward caledonite with microcrystals and possible perite.

    • Mineral Man: Caledonite, Cerussite, Quartz & Chrysocolla from Reward Mine — Dealer archive describing a classic quartz-vug caledonite association from Reward.

    • Miner’s Lunchbox: Update #41, Linarite & Caledonite ML00917 — Dealer archive with specimen dimensions, price, photographs, and video link for Brown Monster-Reward material.

    • Rockhound Record, September 2017: Caledonite Mineral of the Month — Includes photographs and notes on Reward caledonite specimens, including a 2016 TGMS Best of Species example.

    • Caledonite Collector's Guide

    • Brochantite Collector's Guide

    • Linarite Collector's Guide

    • Quartz Collector's Guide