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Tourmaline In Muscovite

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QRI795697

Tourmaline In Muscovite

Former coll. S.F.C. Adrian (UK) & G. Gauthier (F)

Description Tabs

Description
Locality: 
Minas Gerais, Brazil
Class: 
Crystal Group/Cluster
Size Range: 
Small cabinet (7-10 cm)
Size: 
8.1 × 5.3 × 0.1 cm
Largest Crystal: 
1.50cm
Weight: 
2.00gr
Description

Possibly the most unusual specimen of the entire auction.

Two sprays of dark tourmaline (probably shorl) diverge in a millimetric thick muscovite package. One spray is basically a bowtie. Muscovite is transparent (see the picture with the Plinius logo) and displays very good lustre too.

A pedigreed specimen, as it comes with two significant labels too: former Adrian (UK) and Gauthier (F)

Pasted Label
Mineral Data
What's on the rock

Tourmaline

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

Muscovite

Formula: 
KAl2(AlSi3O10)(OH)2
Strunz: 
9.EC.15
Hardness: 
2.5
Streak: 
White

Seller Information

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Shipping within 15 days after payment received, unless specified/agreed otherwise.

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