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Schorl

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DVE95302

Schorl

Ex-David J. Eicher Collection; ex-John H. Eicher Collection

Description Tabs

Description
Locality: 
Black Hills, Lawrence County, South Dakota, United States of America
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.7 × 2.7 × 2 cm
Description

Jet-black schorl crystal section in quartz self-collected by John H. Eicher on a western trip in 1938.

Mineral Data
What's on the rock

Schorl

Formula: 
Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Strunz: 
9.CK.05
Hardness: 
7.0
David J. Eicher

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