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Photo: Wikimedia Commons
The principal source is the Bor Pit, also known as the Boron Pit or Bor Quarry, at the Dalânegorsk B deposit. This is not a small collector prospect but a major boron-bearing calcic-skarn system worked for datolite as an ore mineral. The geological setting is part of what makes the specimens so distinctive: the crystals formed in a boron-rich skarn environment, not in basalt amygdules. In collector terms that means roomy cavities and fractured skarn zones capable of producing robust, three-dimensional clusters, often with quartz, calcite, danburite, axinite, fluorapophyllite-(K), hedenbergite, and ilvaite as associates.

Photo: Wikimedia Commons
Historically, Dalnegorskâs importance is twofold. For industry, the district hosts Russiaâs great borosilicate boron deposit. For collectors, exports from the late Soviet and post-Soviet period introduced large numbers of fine Dalnegorsk minerals to the international market, including datolite, fluorite, quartz, calcite, ilvaite, hedenbergite, and the famous polymetallic-suite minerals from nearby mines. Datolite from the Bor Pit became one of the speciesâ benchmark occurrences: not merely âgood for the locality,â but a locality by which other crystalline datolite is judged.## ç¹éæšæ¬
Search for specimens: View all datolite specimens from Dalnegorsk Urban District, Russia
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Dalnegorskç£ãããã©ã€ãã¯ãçµæ¶ãµã€ãºãå äœåŠãå æ²¢ãè²ãè©äŸ¡åºæºãšããŠæãããããçµæ¶ã¯åææ¶ç³»ã ããæšæ¬ã§ã¯ãã°ãã°ãããã¯ç¶ã»åã¿ã®ããã¿ãç¶ã»ããã³åœ¢ã»è€éã«é¢åãããã圢ããšããé¢ã®èŒªéã¯ã»ãŒå «è§åœ¢ã«èŠããããšããããããè¯ãé±ç©ã¯ãã¯ã£ãããšãã facesãã¬ã©ã¹å æ²¢ããããŠå°ããªçµæ¶ã®è¡šé¢ã® crust ã®ã¿ãšããå°è±¡ã§ã¯ãªããäžæ¬¡å æ§é ã®åŒ·ãæèŠã瀺ãã
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çµæ¶ãµã€ãºã¯å€§ããå€åããããã£ããããã»ãããã¥ã¢çŽã®çµæ¶ãçŽ1â3 cmçšåºŠã®ãã®ãåžå Žã§æ¯èŒçããèŠããããããåªããåçµæ¶ã¯æ°ã»ã³ãã«éããããšããããå€ãèšè¿°ããã£ãŒã©ãŒã¬ã³ãŒãã«ã¯å€§åã®è¯çŸãªçµæ¶ããã£ããããçŽã®ã¯ã©ã¹ã¿ãŒãèšé²ãããŠãããWikimediaããã¹ããã Bor Pit ã®æšæ¬ã«ã¯ãçŽ15.5 à 7.3 à 6.2 cm ã®çµæ¶åæšæ¬ããããåã ã®çµæ¶ã¯æå€§çŽ3 cmãMindat ã®ã®ã£ã©ãªãŒã¬ã³ãŒãã«ã¯ãã¬ã©ã¹å æ²¢ã®ã©ã€ã ã°ãªãŒã³çµæ¶ã®7.4 cmæšæ¬ãã5â7 cm çšåºŠã®ä»ã®ãã£ããããäœåãå«ãŸããŠããã
é¢é£é±ç©ã¯ãåž°å±ãšçŸèгã®éèŠãªèŠçŽ ã§ãããç³è±ãæãç¹åŸŽçãªé¢é£é±ç©ã§ãéæã»ç ç¶ã»ã¢ã¡ãžã¹ãæ§ã»åæ¶ã»å¹²æžæé·ã®çµæ¶ãšããŠçŸããããšããããæ¹è§£ç³ãé »ç¹ã§ãæ·¡è²ãŸãã¯ãã³ã¯ããã£ãçµæ¶ã察æ¯ãåãããããšãããããã³ãã¥ã©ã€ãã¯ç¹ã«æå³ã®ããé¢é£é±ç©ã§ãåã硌çªé žå¡©ã®è©±é¡æã«å±ããå ¬è¡šãããå ±åçè§£éã®äžã§ãããã©ã€ãã®å ç©ã®åã«çŸããããšãå€ããã¢ã¯ã·ãã€ã-(Fe)ãããã³ããŒã°ç³ãã€ã«ãŽã¡ã€ãããã«ãªãã¢ããã£ã©ã€ã-(K)ãã¢ã³ãã©ãã€ãã Bor Pit ããã³é£æ¥ã® Dalnegorsk ç£å°ããã®ä¿¡é Œã§ããé¢é£ã§ããã
æé«å質㮠Dalnegorsk ãããã©ã€ãæšæ¬ã¯ãããã€ãã®ç¹åŸŽãå ±æããïŒæå·ã®ãªãçµç«¯éšãšé¢åãããããšããžããã§ãŒã¯ç¶ã®è¡šé¢ã§ã¯ãªãã¬ã©ã¹å æ²¢ãåæŽã®ãšãããèŠèŠçã«çŸããåã ã®çµæ¶ã奜ãŸããç·ã»éç·ã»é»ç·è²ããããŠèªç¶ã®åºè³ªãŸãã¯é£é¢ãäœåãæ¯ããããããã©ã€ãçµæ¶ãå°ããå Žåã§ããçŸèгã®ããç³è±ãšã®é¢é£ã¯éåžžã«ã³ã¬ã¯ã¿ãã«ã«ãªãåŸãã Calcite äžã®åçµæ¶ã¯ãè²ãšå æ²¢ã匷ããã°åè¶ãããã³ã³ãã©ã¹ãã®ãªã巚倧ã§ãããã¯ç¶ã®ã¯ã©ã¹ã¿ãŒã¯å ¥æãããããäŸ¡æ Œãããã«å¿ããŠèšå®ãããã¹ãã§ãããçããåæ¶ããŒãã©ã€ãã¯ãç¹å¥ãªãµãã«ããŽãªãŒã§ããMindat ã® Bor Pit çºçå°ã®æ³šèšã«ã¯ãéåžžã«çããåæ¶ãèšåãããŠãããæ¢ç¥ã®äŸã¯ãããããã§ãçã Mineralogical Record ã®è«æããã«ããŽã«ã¹ã¯ç£ã®åæ¶ããŒãã©ã€ãã«ç¹åããŠèãããŠããŸãããããã¯éåžžã®å ±æé·ã¯ã©ã¹ã¿ãŒãšæ··åãã¹ãã§ã¯ãªããçã®åæ¶ã¯çµæ¶åŠç確èªãæ éã«è¡ããã確åºããç£å°æ å ±ãå¿ èŠã§ãã## Collector Notes
Dalnegorsk datolite is common enough that fine examples remain obtainable, but the best material is not casually abundant. Ordinary clusters, especially pale, blocky, or partly contacted pieces, appear regularly. Exceptional cabinet specimens with glassy crystals, strong color, undamaged architecture, or rare associations are much less common and have become increasingly dependent on older stocks and collection dispersals.
Recent market records show a wide range. Modest datolite-on-quartz pieces may sell in the low tens of dollars, while good miniatures and small cabinet specimens commonly move into the hundreds. A 2026 Mineral Auctions record for a gemmy pale seafoam to blue-green miniature from the Bor Mine closed at $365, and Minfind recorded an Arkenstone-listed 40 x 30 x 20 mm Dalnegorsk datolite at $900 in April 2026. Larger, three-dimensional, high-quality Bor Pit cabinet pieces have also sold at auction in the several-hundred-dollar range. As always, condition, aesthetics, and provenance matter more than size alone.
There is no well-documented, locality-specific plague of fake Dalnegorsk datolite. The species is not a common target for routine dyeing or heat-treatment fraud in the way that agate, quartz, âcitrine,â hemimorphite, or coated novelty minerals are. The more realistic concerns are mislabeling, repaired crystals, glued clusters, undisclosed trimming, and confused associations. Because Dalnegorsk is a prolific district with several nearby mines, labels may be vague: âDalnegorskâ can refer to the Bor Pit, 1st Sovetskii, 2nd Sovetskii, Nikolaevskiy, Verkhnii, or other occurrences. For datolite, the Bor Pit/Bor Mine attribution is most desirable when the specimen style supports it.
Condition issues are straightforward but important. Datolite has moderate hardness, brittle crystal edges, and many sharp faces; small chips along bevels and exposed edges are common. Colorless or pale crystals can hide bruises until viewed under strong oblique light. Quartz-associated pieces may have broken quartz points, while calcite associations can show bruising, cleavage, or acid-cleaning damage. Check for glue under prominent single crystals, especially on matrix pieces where the attachment is visually convenient but geologically suspicious.
Dalnegorsk material can be confused with other greenish datolite localities, but the combination of large blocky crystals, borosilicate skarn associations, and Russian Far East provenance is usually distinctive. Paterson-area New Jersey datolite tends to have a different trap-rock habit and scale; Charcas, Mexico, material has its own style; and Michigan datolite is usually nodular lapidary material rather than glassy skarn crystals. When buying better examples, look for older Russian labels, recognized dealer provenance, or locality-specific associations such as quartz, danburite, axinite, hedenbergite, or ilvaite.## Stories & Field Notes
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ãœé£åŽ©å£åŸã®åžå Žã¯å¥ã®ç« ã远å ãããè€æ°ã®å ¬è¡šæšæ¬èª¬æãšãã£ãŒã©ãŒã®èšé²ã¯ã1980幎代ããã³1990幎代åé ããçŸåšåèµåã§èŠãããå€ãã®ææã®å€å žçãªææãšããŠææããŠããããŠã£ãã¡ãã£ã¢ã»ã³ã¢ã³ãºæ²èŒã®Rob Lavinskyã®æšæ¬ã®èª¬æã«ã¯ã15.5 x 7.3 x 6.2 cmã®çµæ¶åãããã«ããŽã«ã¹ã¯ã»ããŒã¿ã©ã€ãã§ãåšå²ãå®å šã«çµæ¶åãããéãçµæ¶ã3 cmãŸã§æºããŠãããšãããä»éããæ³šèšã«ã¯ããã®å€è²ã®ãã«ããŽã«ã¹ã¯ã»ããŒã¿ã©ã€ãã®è¯åã¯äž»ã«1980幎代ã«åºçŸãããã®åŸãå£ã厩ããåŸã«åžå Žãžãšæµãåºãããšããããã®ãæµããã¯ãå€ãã®è¥¿æŽã®ã³ã¬ã¯ã¿ãŒãæåã«ãã®ç£å°ã«åºäŒã£ã圢ã§ããããœé£ã®å°è³ªå ±åã®äžé£ã®èšè¿°ãšããŠã§ã¯ãªããããŒãœã³ã®ã±ãŒã¹ãé信販売ãªã¹ãã«ã°ã©ã¹ç¶ã®ç·è²çµæ¶ãå±ãå æ¯ãšããŠçŸããã
ç£å°ã«ã¯ãŸããçµæ¶åŠã®æ¢åµã¹ããŒãªãŒãæœãã§ããããã«ããŽã«ã¹ã¯ã®ããŒã¿ã©ã€ãã®ãã€ã³ã¯æ¥µããŠåžå°ã§ãMindatã®ç£å°ããŒãã«ã¯ãç¥ãããŠããã®ã¯4ã€ã5ã€ã®ã¿ããšèšããã2009幎㮠Mineralogical Record ã®è«æããããã«æ§ããããŠãããéåžžã®çµæ¶ã®ãã©ãããç¡æ°ã«çç£ãããç£å°ã§ãçã®ãã€ã³ã¯å¥ã®çš®é¡ã®è³ãšãªããæå€§çŽã®ãã®ãæãç·è²ã®æšæ¬ã§ã¯ãªããç ç©¶ãããéè³ãããã¹ããšåŒã³ãããããæšæ¬ã§ããã## é±ç©åŠçèšé²ãšåè¡ç©- [Mindat ã®åºçŸèšé²: Bor Pit, Dalânegorsk B æåç¹ããã®ãã€ãªã¿ã€ã]ïŒhttps://www.mindat.org/locentry-14069.htmlïŒâ å ¬åŒã® locality åºçŸããŒãžã®èŠç¹ã§ãåŒãåºçŸããŒããåžå°ãªåæ¶ããŒããåçããŒã¿ã«åºã¥ãé¢é£é±ç©ãããã³åèæç®ãªã¹ããå«ãã
[Mindat ã® locality ããŒãž: Bor Pit, Dalânegorsk B deposit]ïŒhttps://www.mindat.org/loc-4639.htmlïŒâ Bor Pit/Boron Pit/Bor Quarry ã®äž»èŠããŒã«ãªãã£ããŒãžã§ã座æšãåé ç®ãé±ç©ãªã¹ããæŽå²çåç§°ãããã³åèæç®ãå«ãã
[Mindat ã® locality ããŒãž: Dalnegorsk, Dalnegorsk Urban District]ïŒhttps://www.mindat.org/loc-2635.htmlïŒâ åºå Dalnegorsk å°ååºã®å°åããŒã«ãªãã£ããŒãžã§ãããã³ã¹ã«ã«ã³ãšå€éå±é±ç©ã®è€å矀ãå«ãã
Grant, Raymond W., ããã³ Wendell E. Wilson. âFamous Mineral Localities: Dalânegorsk, Primorskiy Kray, Russia.â The Mineralogical Record 32, no. 1, 3â30, 2001 â Dalnegorsk ã®å€å žçãªæ¡éå®¶åãããŒã«ãªãã£è§£èª¬ã§ãMindat ã district å šäœã§åŒçšããŠããã
Mineralogical Record ããã¯ã€ã·ã¥ãŒ: 2001幎1æâ2æ, Vol. 32 No. 1 â Dalnegorsk æ²èŒå·ã®åºç瀟ããŒãžã§ãGrant ãš Wilson ã®è«æãšå·ã®æ§æãæ²èŒã
Wilson, Marc L., R. Peter Richards, and Marc DeGraef. âTwinned datolite from Dalnegorsk, Primorskiy Kray, Russia.â The Mineralogical Record 40, no. 2, 127â129, 2009 â Bor Pit ã®ãã€ãªã¿ã€ãåºçŸèšé²ã§åŒçšãããçå ±åã§ãåžå°ãªåæ¶ææã«ãšã£ãŠéèŠã
Cook, Robert B. âConnoisseurâs Choice: Datolite, Dalnegorsk, Primorskiy Kray, Russia.â Rocks & Minerals 85, no. 4, 338â345, 2010 â Dalnegorsk ã®ãã€ãªã¿ã€ãã«é¢ããçš®ãšããŒã«ãªãã£ã«çŠç¹ãåœãŠãè«æãDOI 10.1080/00357529.2010.492658ã
Prokofâev, V. Yu., M. G. Dobrovolâskaya, F. G. Reif, Yu. M. Ishkov, and T. B. Zhukova. âComposition of Ore-Bearing Fluids in the Dalânegorsk Borosilicate Deposit, Russia.â Doklady Earth Sciences 391, no. 5, 699â702, 2003 â å°è³ªåŠè«æã§ã¹ã«ã«ã³ãããã·ãªã±ãŒããç³è±-çé žå¡©æ®µéãšé±åºã®ããã³æ¿åºŠãèŠçŽã
PDF: âComposition of Ore-Bearing Fluids in the Dalânegorsk Borosilicate Deposit, Russiaâ â Doklady Earth Sciences è«æã®å šæPDFã
Karasâ, O. A., and V. V. Ratkin. âDalânegorsk skarn deposit, Sikhote-Alin: Stages and sources of matter for borosilicate ores.â Doklady Earth Sciences 455, no. 2, 411â413, 2014 â ãã³ããªç³ãšããã§ã«ãã®æ¯èŒç ç©¶ãã¢ãã©ã€ããšããæºã®è°è«ïŒã¿ãŠãã³ä»å äœå¢çã§ã®è°è«ã
Baskina, V. A., V. Yu. Prokofâev, V. A. Lebedev, S. Ye. Borisovskiy, and coauthors. âThe Dalânegorsk borosilicate skarn deposit, Primorye, Russia: Composition of ore-bearing solutions and boron sources.â Geology of Ore Deposits 51, no. 3, 179â196, 2009 â 巚倧ãªããã·ãªã±ãŒãã¹ã«ã«ã³é±åºã®è©³çްãªå°çååŠçåŠçã
Shchipalkina, N. V., I. V. Pekov, D. A. Ksenofontov, N. V. Chukanov, D. I. Belakovskiy, and N. N. Koshlyakova. âDalnegorskite, Ca5Mn(Si3O9)2, a new pyroxenoid of the bustamite structure typeâŠâ Zapiski RMO 148, no. 2, 61â75, 2019 â ãã«åããã® dalnegorskite ã®æ°é±ç©èª¬æãtype skarn ã¢ã»ã³ããªã«ããã datolite ã®é¢é£é±ç©ãšããŠé¢é£æ§ãããã
Handbook of Mineralogy: Dalnegorskite PDF â ãã«åã¿ã€ã-ããŒã«ãªãã£ã®é±ç© dalnegorskite ãš datoliteãhedenbergiteãããã³ä»ã® skarn é±ç©ãšã®é¢é£ã®èŠçŽåç §ã
Wikimedia Commons: File:Datolite-221327.jpg â Rob Lavinsky/iRocks ã«ãã 15.5 à 7.3 à 6.2 cm ã®ãã«å datolite æšæ¬ã®ç»åèšé²ã
Wikimedia Commons: File:Datolite-131739.jpg â Rob Lavinsky/iRocks ã«ãã 3.9 à 3.7 à 2.5 cm ã® datolite ã¯ã©ã¹ã¿ãŒïŒ1980幎代ã®ãã«å鱿¥ïŒã«é¢ããç»åèšé²ã
Wikimedia Commons category: Bor Pit â datoliteãã¯ã©ãŒããæ¹è§£ç³ãããã³é¢é£ãã skarn é±ç©ãå«ã倿°ã® Bor Pit é±ç©åçã®ç»åã«ããŽãªã## Further Reading & External Links
Mindat Best of Datolite â Collector-oriented overview that explicitly recognizes Dalnegorsk as one of the premier datolite localities.
Mindat datolite mineral page â Core mineral data for datolite, including formula, crystallography, physical properties, and global locality context.
Mindat Bor Pit photo gallery â Large gallery of Bor Pit specimens and locality photographs, useful for learning the visual range of Dalnegorsk material.
Rock Currier 1993 Bor Pit locality photograph on Mindat â Historic field photograph and note describing the open pit, datolite ore mining, and collected-out datolite/quartz pockets.
PMC: âThe Study of Airborne Particulate Matter in Dalnegorsk Townâ â Environmental study with useful modern context on the borosilicate deposit being worked by open-pit drilling and blasting within Dalnegorsk.
USGS Open-File Report 2005-1294-D PDF â Includes a schematic geologic map and description of the Dalnegorsk boron skarn deposit.
USGS deposit models PDF: Boron datolite skarn â Deposit-model context for boron skarns, including Dalnegorsk as the major example.
AK&M 2026 report on the Dalnegorsk boric-acid production complex â Current industrial context for the boron-products complex connected with Dalnegorsk datolite concentrate.
Mineral Auctions: 2026 gemmy Dalnegorsk datolite auction record â Recent market example for a high-quality gemmy Dalnegorsk datolite miniature.
Minfind: 2026 Dalnegorsk datolite listing â Recent market snapshot for a gemmy Bor Mine datolite specimen.
Boren & King Minerals: datolite on interference quartz from the Bor Pit â Accessible dealer example showing a modestly priced datolite-quartz association from the locality.