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Tourmaline Var Indicolite With Petalite

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LGM893202

Tourmaline Var Indicolite With Petalite

Ex Dr. Krantz, Bonn, Germany
With Antique Label

Description Tabs

Description
Locality: 
Utö Island, Haninge, Stockholm County, Sweden
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
2.8 × 4.5 × 1.2 cm
Weight: 
23.70gr
Description

Uncommon, deep blue tourmaline var indicolite is embedded in light brown to cream-colored, crystalline petalite from the type locality 'Utö island, Södermanland, Sweden'. First described in 1800, from the Greek "petalon" for leaf, in allusion to the perfect basal cleavage, which is apparently visible.

This is a rare specimen which comes with antique on-glued sticker. The sticker means: "Indigolith in Petalit - Utö - Schweden" (Indicolite in petalite, Utö, Sweden)

Mineral Data
What's on the rock

Tourmaline

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

Indicolite

Variety Of: 

Tourmaline

Formula: 
A(D3)G6(T6O18)(BO3)3X3Z
Hardness: 
7
Hardness: 
0.0

Petalite

Formula: 
LiAl(Si4O10)
Strunz: 
9.EF.05
Crystal System: 
Monoclinic
Hardness: 
6.5
Streak: 
White
Type Locality: 
Utö Mines, Utö, Södermanland, Sweden

Seller Information

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