Fairfax quarry, Centreville — notable trap-rock locality yielding mint-green prehnite, glassy apophyllite, byssolite, thaumasite and sulfides for collectors.
Key facts
Fairfax quarry at Centreville is one of the great American trap-rock specimen localities: an industrial crushed-stone quarry whose fame rests not on ore, but on the extraordinary mineralized cavities exposed while mining Jurassic diabase in the Culpeper Basin of northern Virginia. To collectors, “Centreville” immediately evokes bright green prehnite, glassy white to colorless apophyllite, fibrous byssolite, thaumasite, and a suite of rare sulfides and silicates that came from fault-controlled tubes, miarolitic cavities, hydrothermally altered zones, and hornfels vugs in and around the diabase. The best pieces have the unmistakable Fairfax look: mint- to apple-green prehnite forming botryoidal crusts, ridged balls, stalactitic masses, or sculptural plates, with lustrous tetragonal apophyllite crystals perched on top like frosted square blossoms.
Regional View
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The locality has long been known under several overlapping names—Fairfax quarry, Centreville quarry, Sissler’s Quarry, and Luck Stone Quarry—and this has made label-reading important. The classic specimen locality is the Luck Stone operation on Route 29 near Centreville in Fairfax County, Virginia, not the separate Fairfax city area and not the nearby Manassas, Bull Run, Chantilly, or Goose Creek quarries, though all belong to the same broader northern Virginia trap-rock collecting tradition. Modern apophyllite-group nomenclature adds another layer: many older labels say simply “apophyllite” or “fluorapophyllite,” whereas later analytical work on northern Virginia material showed that much, and probably most, of the classic “apophyllite” is hydroxyapophyllite-(K). The market still uses the old collector shorthand, but serious locality suites benefit from preserving both the historical label and the modern species name where analysis or reputable attribution supports it.
Fairfax’s importance is amplified by scarcity. The pockets that made the quarry famous were industrial accidents in the happiest sense: transient exposures opened by blasting, faulting, wall collapse, or routine quarry advance, then exhausted or destroyed as the quarry face moved on. The great finds of 1953, 1967, and 1975 supplied the collector community with material that still circulates through old collections, museum holdings, and occasional dealer stock. Fresh collecting access has not been a normal route to specimens for decades, so fine Fairfax pieces today are as much historical artifacts of mid-20th-century field collecting as they are mineral specimens.
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Fairfax quarry is a trap-rock aggregate quarry in the Culpeper Basin, a Mesozoic rift basin extending through northern Virginia. The quarried rock is chiefly diabase—greenish-black to bluish-black, dense, and tough—formed from hot magma emplaced during the opening of the Atlantic. Luck Stone describes the Fairfax material as diabase composed mainly of pyroxene and plagioclase, with epidote and hornblende contributing to the dark green-black character, and notes that the diabase is blended with adjacent sedimentary rock. Mineralogically, the collecting interest comes from late-stage and secondary minerals deposited in cavities rather than from the aggregate rock itself.
The productive specimen environments include diabase and diabase pegmatite, hydrothermally altered zones, calcite veins, fault-related tubes, and vugs in hornfels. In these settings, calcium-rich hydrothermal fluids produced prehnite and apophyllite-group minerals together with zeolites and related silicates. The best-known cavities were tubelike openings associated with a fault in the diabase. Published summaries record major tube exposures in 1953 and 1967 that yielded abundant prehnite, apophyllite, byssolite, and thaumasite, with rarer okenite, wittichenite, and cuprobismutite. A smaller tube was exposed in 1975. These tubes are the source of Fairfax’s legendary cabinet specimens, especially large apophyllite rosettes and tabular clusters on brilliant green prehnite.
The quarry’s commercial life began before its mineral-collecting fame. A quarry may have existed on the Wells property before Fairfax County’s involvement, but the documented county operation began on January 2, 1928, when the Fairfax County Board of Supervisors directed County Engineer F. Norvill Larkin to open a quarry and crush stone for county roads. The county leased land from J. R. and Daisy Wells and from William and Henrietta Griffin, paying a royalty of three cents per cubic yard of stone sold. By May 1928, the county was allowed to sell rock, chips, and dust to Manassas and other municipalities, with proceeds credited to the county road fund.
In 1932, after road-building responsibility shifted to the Commonwealth of Virginia, the county no longer needed to operate the quarry for local road stone. The operation passed through private hands, including Larkin and Saum, and on January 5, 1938, contracts for the Wells, Griffin, and Naylor properties were assigned to Fairfax Quarries, Incorporated, whose president was Charles S. Luck, Jr. Luck Stone’s modern Fairfax Plant traces its ownership to that period and remains associated with the Luck family’s long-running aggregate business. The plant supplied material for major northern Virginia infrastructure, including Interstate 66, Dulles Airport, schools, and hospitals.
As a collecting locality, Fairfax belongs to the classic era of active-quarry field collecting, when permission was sometimes obtainable and productive weekends could rescue specimens that blasting or crushing would otherwise destroy. That era is over for practical purposes. The plant is an active industrial site, with current operations and reclamation planning governed by permits, safety requirements, and company policy. The North Pit has ceased production mining and is part of a reclamation program, while the South Pit has been described by Luck Stone as continuing for the foreseeable future. Local collectors have reported that the Centreville/Fairfax quarry has not allowed collecting for decades. Any visit without explicit permission from the landowner and operator would be unsafe, illegal, and damaging to future relations between quarries and the mineral community.
The most collectible Fairfax specimens are therefore old-stock pieces, especially those with labels tying them to the 1953, 1967, or 1975 tube finds, or to known collectors such as John Medici, Dave Siegert, Harold Levey, Ed Swoboda, Kay Robertson, George Loud, John Betts, or other mid-Atlantic field collectors and connoisseurs. A Fairfax label is strongest when it uses one of the historical quarry names and is accompanied by a collection number, acquisition date, old dealer label, or publication reference. Because nearby northern Virginia trap-rock quarries produced superficially similar prehnite, apophyllite, stilbite, datolite, and byssolite, locality precision matters.
Fairfax prehnite is the green architecture on which the locality’s reputation was built: botryoidal crusts, radiating balls, stalactitic forms, ridged crystal aggregates, and thick plates lining fault tubes and vugs in the diabase. The best material is an exceptionally bright mint to apple green, sometimes translucent at the edges, and it occurs with hydroxyapophyllite-(K), byssolite, thaumasite, datolite, quartz, bornite, chalcopyrite, epidote, and other late minerals. Specimen sizes range from thumbnails and miniatures to substantial cabinet plates; published and museum examples include large pieces in the tens of centimeters, and one educational display specimen from Fairfax has been described as about 40 cm across with apophyllite. Ordinary Fairfax prehnite is massive, dull, bruised, or broken from blasting; good pieces have clean sculptural form, saturated green color, intact botryoidal or stalactitic surfaces, and, ideally, sharply placed apophyllite crystals that create contrast without crowding the composition.
The classic “apophyllite” from Fairfax is now best treated, when not individually analyzed, as apophyllite-group material dominated by hydroxyapophyllite-(K), with older labels often reading apophyllite or fluorapophyllite. It occurs as glassy, translucent to opaque, colorless, white, faintly pink, or light tan tetragonal crystals, commonly tabular to blocky and commonly set directly on bright green prehnite. The 1967 tube produced the locality’s finest examples, including tabular crystals and subparallel rose-like aggregates; accounts of top pieces describe crystals to several centimeters on edge, with one widely cited discussion noting Fairfax rosettes up to about 17 cm across on the finest Smithsonian-class specimen. Small cabinet pieces with 1–2 cm crystals are desirable when lustrous and undamaged, but the great Fairfax apophyllites are cabinet and large-cabinet specimens where sharply developed crystals rise from contrasting prehnite rather than sitting on dark, visually heavy diabase alone.
Beyond prehnite and apophyllite, Fairfax quarry has a deep species list for a trap-rock locality. Documented minerals include actinolite var. byssolite, acanthite, albite, analcime, anthophyllite, apatite, babingtonite, bornite, calcite, chabazite, chalcopyrite, chlorapatite, clinozoisite, cuprobismutite, datolite, diopside, epidote, galena, greenockite, gypsum, hematite, heulandite-subgroup minerals, ilmenite, K-feldspar var. adularia, laumontite, loudounite, magnetite, malachite, mesolite, native silver, natrolite, okenite, pectolite, pyrite, quartz, schorl, sphalerite, stellerite, stilbite-subgroup minerals, thaumasite, thomsonite-subgroup minerals, titanite, wittichenite, and wurtzite. Loudounite is especially interesting: its type locality is New Goose Creek Quarry in Loudoun County, but the species has also been reported from Fairfax. The locality’s rarities are mostly micro- to small-cabinet interests rather than showy display minerals, with native silver noted as wires on prehnite, wittichenite as a historically significant copper-bismuth sulfosalt occurrence, and okenite and cuprobismutite associated with the famous tube mineralization.
Fairfax specimens are most often mislabelled by omission or by regional shorthand. Labels reading only “Centreville, Virginia,” “Sissler’s,” “Luck Quarry,” or “Fairfax Co.” may be perfectly legitimate, but they should be reconciled with the known historical names of the locality and distinguished from Manassas, Bull Run, Chantilly, Virginia Crushed Stone, and the Goose Creek quarries. All of those northern Virginia trap-rock sites can produce green prehnite and pale apophyllite-group crystals, so a specimen’s old label, collection history, and visual style are important. A strong Fairfax provenance is particularly valuable when it ties the piece to the 1967 tube or to documented collectors and older mid-Atlantic collections.
No well-known artificial treatment industry is associated with Fairfax prehnite or apophyllite. The main authenticity concern is locality inflation: ordinary northern Virginia or even Indian Deccan trap material being presented as a classic Fairfax piece. Fairfax apophyllite on prehnite usually has a subdued American trap-rock look—white to colorless tabular or blocky crystals on mint-green prehnite, often with dark diabase or hornfels matrix—rather than the flamboyant green apophyllites, stilbite sheaves, and large zeolite plates typical of Indian material. Conversely, some genuine Fairfax pieces carry outdated “fluorapophyllite” labels because that was the accepted or customary name when they entered collections; old labels should not be discarded simply because nomenclature changed.
Condition is critical. Apophyllite has perfect basal cleavage and can show cleaved corners, bruised faces, contacted tops, or edge wear from blasting and extraction. Prehnite surfaces can be chipped, crushed, or dulled by quarry handling; stalactitic and botryoidal forms are especially vulnerable at high points. Byssolite and other fibrous amphiboles deserve care: Fairfax-area records include asbestiform anthophyllite with tremolite and byssolite from the Sissler/Fairfax/Centreville quarry, so fibrous material should not be abraded, trimmed dry, blown with compressed air, or handled in a way that releases dust. Keep such pieces boxed, avoid aggressive cleaning, and use wet methods and respiratory protection if any conservation work is unavoidable.
Market availability is thin but not absent. Small older specimens and lesser plates surface periodically, while high-quality 1967-type apophyllite-on-prehnite combinations are genuinely scarce and can command strong prices when aesthetic, undamaged, and well provenanced. Dealer and auction records show Fairfax pieces from thumbnails to large cabinets, including old John Medici, Ed Swoboda, Kay Robertson, John Betts, Hal Kramer, George Loud, and Rock Currier-associated examples. The finest pieces are no longer “field-collecting” material; they are classic American zeolite-suite specimens competing with Paterson, Prospect Park, and the best pre-India apophyllite localities for historical importance.
The great Fairfax story is the 1967 tube. John Medici, then already a determined field collector, became part of a crew that worked an extraordinary prehnite-lined tube in a fault at the quarry. Later accounts describe it as a 60-foot prehnite tube in the quarry wall. Access was not a casual stroll across a dump pile: the collectors tied a 100-foot rope to a road post at the top of the quarry, dropped it down the wall, and used it to climb about 15 feet up to the productive zone. Rock falls along the fault periodically exposed more of the tube, so collecting continued on and off for five months.
One surviving large-cabinet specimen from that find records the intensity of the work with unusual precision: apophyllite on prehnite, 22 cm across, collected in July 1967 during a 27-hour dig in a long prehnite tube in a collapsed quarry wall with Dave Siegert. Medici considered that 22-cm plate his favorite Fairfax specimen. An obituary later noted that the tube yielded hundreds of specimens, and that he valued the piece so highly that he kept it in a safe-deposit box at the bank, meaning visitors to his home rarely saw it. That detail says as much about Fairfax as any size measurement: the locality produced specimens good enough that even a veteran field collector treated the best one like a family jewel.
Fairfax also belongs to the social history of mid-Atlantic collecting, a period when clubs, quarry managers, and serious field collectors sometimes maintained a working truce around active aggregate operations. Harold D. Levey, remembered as a patriarch of Maryland mineral collecting, spent so much time at the Centreville quarry that later reminiscence emphasized a now-unimaginable privilege: management once permitted overnight camping. Levey’s Fairfax material was not merely personal treasure; one classic apophyllite-on-prehnite specimen was reportedly traded to the Smithsonian for an African mimetite and then prominently displayed for years. That exchange captures the old status of Centreville material in American cabinets: it was local, yes, but it was good enough to trade into the national collection.
The 1967 discovery also reshaped how collectors judged American apophyllite. Before Indian Deccan specimens overwhelmed the market in quantity and brilliance, American collectors looked to localities such as Paterson and Prospect Park in New Jersey, French Creek in Pennsylvania, and Centreville in Virginia for benchmark apophyllite. Fairfax’s best specimens stood apart because the apophyllite was not merely large or lustrous; it was staged against vivid prehnite. In the strongest pieces, the green base behaves almost like a designed pedestal, lifting white tabular apophyllite crystals into the light. That visual relationship is why old-time collectors still react differently to a true Fairfax combination than to a generic apophyllite plate.
