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Ramsdellite 3.07 ct.



100,00 €

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Ramsdellite  3.07 ct.

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Is a manganese oxide with formula MnO2,hardness 3-3.5

Is Ramsdellite is polymorphous (meaning many shapes) with the relatively common mineral pyrolusite.They have same composition but different structure.

The color is grey to black with metallic luster and always opaque.

It comes from Mistake Mine,Yavapai co., Arizona.

Size:9.2x6.8x5 mm.

Weight:3.07 ct.