CRYSTALS2COLLECT A.C.N 651.525.727 Pty Ltd
POLDERVAARTITE now OLMIITE (miniature)
POLDERVAARTITE now OLMIITE (miniature)
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Poldervaartite, renamed OLMIITE, is an exceptionally rare mineral first identified in 1992 at the Wessels Mine located in the Kalahari manganese fields of Northern Cape Province, South Africa. Its chemical composition is represented by the formula (CaMn2+)2(SiO3OH)(OH), classifying it as a Calcium Manganese Silicate Hydroxide, with a molecular weight of 197.68 grams. To date, the Wessels Mine and the nearby N’Chwaning Mine remain the sole known sources of this mineral. Poldervaartite exhibits a specific gravity of 2.91 g/cm³ and a refractive index ranging from 1.634 to 1.656, categorized as Biaxial (+). Due to the majority of its crystals being unsuitable for faceting, it is considered a very rare gem, displaying colors that vary from colorless to a light orangish-pink.
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Dimensions and Weight
Dimensions and Weight
Dimensions and Weight are mentioned n the product description and will be used during check out to calculate the shipping costs. For example: 55 45 25 127 means Length 55 mm, Width 45 mm, Height 25 mm, Weight 127 grams. The weight is the approximate nett weight of the specimen including the mount (where applicable).
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