COLEMANITE, mine de bore de Gharah Gol Comté de Dandi Mahneshan Province de Zanjan Iran (miniature)
50 45 24 57
$95.00
Prix promotionnel
$95.00
Prix régulier
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COLEMANITE, mine de bore de Gharah Gol Comté de Dandi Mahneshan Province de Zanjan Iran (miniature)
$95.00
Prix promotionnel
$95.00
Prix régulier
Expédition calculée lors du paiement.
La colémanite , de formule chimique Ca₂B₆O₁₁·5H₂O ou encore CaB₃O₄(OH)₃·H₂O, est un minéral boraté que l'on trouve généralement dans les dépôts d'évaporites des milieux lacustres alcalins. Ce minéral secondaire provient de l'altération du borax et de l'ulexite. Identifiée pour la première fois en 1884 près de Furnace Creek, dans la Vallée de la Mort, elle fut nommée en l'honneur de William Tell Coleman, propriétaire de la Harmony Borax Works où elle fut découverte. Fait intéressant, Coleman avait initialement suggéré le nom de « smithite » en hommage à son associé, Francis Marion Smith.
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