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Ferberite 35.42 ct.



219,60 €

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Ferberite 35.42 ct.

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Is a iron tungstate mineral, with formula FeWO4 , belongs to a series with Huebnerite: MnWO4, a manganese rich end member, and Ferberite is the iron rich end member. The Wolframite is intermediate species among them. Ferberite is the rarer member of the series. The hardness is 4-4.5 with sub-metallic luster and heavy specific gravity: 7.6 This stone comes from Bolivia and is hard to find as a cut gem. Some small pits may be present on the surface. For collectors! Size:16.4x16.4x8 mm. Weight:35.42 ct. CODE#3105

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