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Tourmaline

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PDM1028659

Tourmaline

Description Tabs

Description
Locality: 
Custer County, South Dakota, United States of America
Class: 
Single Crystal
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.7 × 2.3 × 1.3 cm
Weight: 
31.00gr
Description

Prismatic striated crystal of black tourmaline from the Custer county. It comes with an attached label. Bought by Dr. Gerard Vogel at the Tucson Show in 1984.

Combine specimens to reduce shipping costs!.

Mineral Data
What's on the rock

Tourmaline

Formula: 
A(D3)G6(T6O18)(BO3)3X3Z
Crystal System: 
Trigonal
Hardness: 
7

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