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åç: James St. John / Wikimedia Commons
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*åç: Rob Lavinsky, iRocks.com / Wikimedia Commons*çå£ãªåéå®¶ã«ãšã£ãŠãé åã¯äžéã«ããã第äžã¯çŸåŠïŒæé«çŽã®çµæ¶ã¯ãçŸä»£ã®äžåœç£ææã®æ¯ç¶ã§éç¶ãªãã®ãšã¯ç°ãªãå³ç²ã§éå±çãªåšå³ãæã€ã第äºã¯æŽå²ç䟡å€ïŒäžãä¹ åïŒIchinokawaïŒã©ãã«ã¯æšæ¬ãé±ç©æ¡éã®åºç€çãªå€å žçå°åã®äžã€ connected connect ïŒ wait. Translate properly: Ichinokawaã©ãã«ã¯æšæ¬ãé±ç©æ¡éã®åºç€çãªå€å žçå°æ¹ã®äžã€ã«çµã³ã€ããã第äžã¯åžå°æ§ïŒãã®é±å±±ã¯1957幎以ééå±±ããŠãããåªè¯æšæ¬ã®å€ãã¯äžä»£åã«åç©é€šãå€ãç§èšã³ã¬ã¯ã·ã§ã³ã«å ¥ã£ãã## ç¹éæšæ¬
Search for specimens: View all stibnite specimens from Ichinokawa Mine, Japan
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Authentic Ichinokawa stibnite is scarce because the mine is long closed and most significant specimens were collected in the late nineteenth and early twentieth centuries. The market is therefore dominated by old-collection pieces: single crystals, partial crystal groups, and occasional larger cabinet specimens that surface from estate collections, European dealer stock, Japanese collections, or museum deaccession history. Freshly collected Ichinokawa material should be treated with skepticism unless the provenance is exceptionally clear.
The most common authenticity issue is misattribution rather than outright fabrication. Stibnite from China, Romania, Italy, or other localities may be offered simply as âJapaneseâ or may acquire an Ichinokawa attribution because it has thick crystals or an old look. A convincing Ichinokawa specimen should match the locality style and ideally carry supporting labels or a collection history. Old labels from Japanese, European, or American collections add substantial confidence, especially when the specimen itself shows the robust, striated, steel-gray habit expected from the locality.
No well-documented, locality-specific treatment tradition is associated with Ichinokawa stibnite in the way that some gem minerals have known enhancement practices. That said, repairs are common enough to be expected on larger stibnite from any classic locality. Look carefully for glued terminations, reattached crystals, filled cracks, dark adhesive along contacts, and base repairs concealed by old matrix or mounting material. Because stibnite has perfect cleavage and a low hardness, an apparently dramatic âterminationâ can sometimes be a cleaved or worn end rather than a natural growth termination.
Condition issues are central. Stibnite is soft enough to scratch easily, fragile enough to bruise along edges, and chemically prone to dulling or darkening with long exposure to air and light. Ichinokawa crystals should be handled as little as possible, never cleaned aggressively, and never scrubbed. Dust removal is safest with a very soft air bulb or the lightest possible brush, avoiding pressure on terminations and crystal edges. The mineral contains antimony; normal display handling is not usually the principal concern, but avoid inhaling dust, licking or wet-cleaning the specimen, or allowing children to handle it.
Display requires restraint. Strong direct light can emphasize metallic luster, but prolonged bright light and open-air exposure may accelerate dulling. The SaijÅ City Local History Museum keeps a major Ichinokawa specimen in a sealed case because of oxidation concerns. For a private cabinet, a stable, dry, closed display case is preferable to an open shelf. Support the specimen securely; long single crystals are especially vulnerable to snapping if a base shifts.çŸè¡åžå Žã§ã¯ãå°ãäžèŠæš¡ã®äžãå·ç£ã·ã³ã°ã«ã»ã¯ã©ã¹ã¿ãŒãæã çŸããäžæ¹ã§ã倧åã§ç¡å·ã»çŸèгã®ãã矀ã¯çšã§ç«¶äºãæ¿ããã å€ãã©ãã«ã確ããªç£å°ã匷ãå æ²¢ãèªç¶çµç«¯ãæå°éã®ä¿®åŸ©ãäŒŽãæšæ¬ã¯ããµã€ãºãæ§ããã§ãäžäœã¯ã©ã¹ã«å€ããã åºçºå°ãææ§ãªæšæ¬ã衚é¢ãéãæ¹å€ãããŠãããæ¥çäœæ¥ãå€ãããŸãã¯ç«¯ãæããŠããæšæ¬ã¯ãããçžå¿ã®äŸ¡æ Œãšèšè¿°ã§æ±ãã¹ãã§ããã## Stories & Field Notes
æé«ã®äžãåå·ïŒ Ichinokawa ïŒã®ç©èªã¯ãé³ãšãšãã«éã®äžããå§ãŸãã1893幎ã«é±å±±ã§åãå§ããå é±å€«ã®å «éäžäœã¯ãééé±ã®ç©ºæŽã¯ãéãéããé±å€«ã®è¶³é³ãåé¿ãããã»ã©ç©ºæŽã空æŽã§ãããããèŠã€ããããšãã§ãããšèšæ¶ããŠããããã±ããã¯ãã èŠãã ãã§ã¯ãªããè³ã§èããªããã°ãªããªãã£ããèŠã€ãã£ãããé©ãã¹ãå¿èã§éãå¿ èŠããã£ããçç·Žã®ã¯ãµãè·äººã¯å€§ããªçµæ¶ãå£ããã«åãåºããããçŽ90 cmãåšå²ã«æããçµæ¶ãè§£æŸããããããŠå€§ããªçµæ¶ã¯ã»ãšãã©çãç©ã®ããã«æ±ããããé±å€«ãã¡ã¯ã空æŽã®äžã®çµæ¶ã¯ããŸã æé·ããŠããããšèšãã圌ããæããæããããšäœæ¥ãèŠæ±ããæ éããåæã«äŒããèšãåãã ã£ãã
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Wendell E. Wilson and Ichiro Tanabe, âThe Ichinokawa Stibnite Mine, Ehime, Shikoku Island, Japan,â The Mineralogical Record, 56(2), 2025 sample PDF â æŽå²ãæ§ã³ã¬ã¯ã·ã§ã³ãåç©é€šæšæ¬ã匷調ããçŸä»£çã§è±å¯ãªå³çä»ãã®è§£èª¬ã
Mindat locality page: Ichinokawa Mine, SaijÅ City, Ehime Prefecture, Japan â çŸåšã®é±ç©ãªã¹ããæç®ãåçã®ã£ã©ãªãŒãããã³ç£å°éå±€ã
Mindat occurrence page: stibnite from Ichinokawa Mine â çš®ç¹æã®ç£åºããŒãžã§ãç£å°ãäžçã¯ã©ã¹ã®ç«çŽç³ïŒã¢ã³ãã¢ã³ïŒãšããŠåé¡ããé¢é£åçããŒã¿ãæ²èŒã
SaijÅ City Board of Education, âThe History of Ichinokawa Mine,â Chapters 1â4 â åæã®æŽå²ãã¢ã³ãã¢ã³ã®èæ¯ãé¡èãªç«çŽç³æšæ¬ãæ±ãè±èš³ã
SaijÅ City Board of Education, âThe History of Ichinokawa Mine,â Chapters 5â10 â 岩èåŠãèã®èšè¿°ãæ±æžããææ²»ã®ææ¥ãé±å±±ã®é»éæä»£ãå«ãè±èš³ã
SaijÅ City Board of Education, âThe History of Ichinokawa Mine,â Chapters 11âAppendices â å€§æ£æä»£ã®æ©åšãäœæ¥è ãéå ·ãæãéå±±ã®è©³çްãè±èš³ã§ preserved ã
SaijÅ City, âIchinokawa Mine â the worldâs top stibnite mineâ â è¡æ¿ããŒãžãçç£éã®æ°åãã¢ã¯ã»ã¹èŠåãç°¡æœãªæŽå²ãæ²èŒã
SaijÅ City PDF, âIchinokawa Mine facts â world-class stibnite mineâ â æ¥æ¬èªã®èªæ²»äœæè²çšPDFã§ãå°è³ªãæšæ¬ã®ãµã€ãºãåç©é€šæèµã玹ä»ã
Kotobank / Heibonsha, âIchinokawa Mine,â from the latest earth-science dictionary â çç£ãåºç€å²©ãèã®ååžãé±ç©çš®ãèŠçŽãã compact ãªæ¥æ¬èªå°åŠé ç®ã
Yamashita, S. (1950), âX-ray Study of Stibnite on thermal changes, found in Ichinokawa Mine, Ehime Prefecture,â Journal of the Japanese Association of Mineralogists, Petrologists and Economic Geologists, 34(5), 157â164 â ç«çŽç³ã«é¢ããé±ç©åŠçç ç©¶ãuhisa, M., Miyashita, Y., and Okamoto, K. (2002), âLow-temperature crystal structures of stibnite implying orbital overlap of Sb 5s2 inert pair electrons,â Physics and Chemistry of Minerals, 29(4), 254â260]() â Structural study using a stibnite crystal selected from an Ichinokawa specimen.
Charles Palache and DeWitt Morrell, âCrystallography of Stibnite and Orpiment from Manhattan, Nevada,â American Mineralogist, 15, 365â374, 1930 â Not an Ichinokawa paper, but it explicitly compares Manhattan stibnite forms to the well-studied Japanese material and cites O. Nefâs 1923 work on Ichinokawa stibnite.
Wikimedia Commons: Ichinokawa stibnite in the Harvard Mineralogical Museum, photo by James St. John â Freely licensed image of a Harvard specimen from the classic locality.
Wikimedia Commons: 10 cm Ichinokawa stibnite, photo by Rob Lavinsky â Freely licensed image of an old-collection cabinet crystal, ex Ed Ruggiero Collection, purchased from Pala Properties in 1975.
Ichinokawa preservation site: museum stibnites â Japanese page listing notable Ichinokawa specimens in Japanese museums, including examples at Ehime Prefectural Science Museum, Kyoto University Museum, Mie Prefectural Museum, and the University Museum of the University of Tokyo.## ãããªãèªã¿ç©ãšå€éšãªã³ã¯
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