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Tourmaline Var Schorl

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PCZ725723

Tourmaline Var Schorl

Ex Ian Jones Collection

Description Tabs

Description
Locality: 
Hingston Down Quarry, Calstock, Cornwall, United Kingdom
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4.4 × 3.7 × 3.4 cm
Description

An actractive little specimen consisting of slender black crystals of schorl on matrix. Small but well formed tourmaline from Cornwall. A nice little display.

Collected: 
August 1979
Condition
General: 
Excellent - locality specimen
Main Display: 
Very good - See description
Mineral Data
What's on the rock

Tourmaline

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

Schorl

Formula: 
Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Strunz: 
9.CK.05
Hardness: 
7.0
Provenance
Peter Crozier Minerals