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Tourmaline

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AST967099

Tourmaline

With Antique Label

Description Tabs

Description
Locality: 
Wissahickon Valley, Philadelphia County, Pennsylvania, United States of America
Class: 
Crystal Group/Cluster
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.8 × 3 × 2 cm
Description

Old specimen of intergrown tourmaline crystals with remains of mica schist matrix. Specimen comes with three old labels written in French, upper left (with specimen's number) is probably Damour label, right label is a list of tourmaline localities. Specimen is from the collection of Spiridon Despozitos, a businessman and mines owner, active during 1890-1920 in Athens. Specimen will come with labels and base as pictured.

Mineral Data
What's on the rock

Tourmaline

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

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