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Stilpnomelane

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SER960506

Stilpnomelane

ex Americo Urbinati collection

Description Tabs

Description
Locality: 
Sterling Mine, Antwerp, Jefferson County, New York, United States of America
Class: 
Crystal Group/Cluster
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4 × 3 × 2 cm
Description

several balls of bronze chalcodite, a member of stilpnomelane group

Mineral Data
What's on the rock

Stilpnomelane

Formula: 
(K,Ca,Na)(Fe2+,Mg,Al,Fe3+)8(Si,Al)12(O,OH)36·nH2O
Strunz: 
9.EG.40
Hardness: 
3.0 - 4.0
Type Locality: 
Melchior and Tobias adits, Horní Údolí (Obergrund), Zlaté Hory (Zuckmantel), Olomouc Region, Moravia (Mähren; Maehren), Czech Republic