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Tourmaline Var Trapiche

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TWH528747

Tourmaline Var Trapiche

Classic Locality

Description Tabs

Description
Locality: 
Kavungu Mine, Jivunda, Mwinilunga District, North-Western Province, Zambia
Class: 
Single Crystal
Size Range: 
Thumbnail (1-3cm)
Size: 
1 × 0.8 × 0.2 cm
Description

The specimen is sliced and polished to be seen its trapiche pattern. The very first occurrence of trapiche tourmaline analysed as Uvite was taken place in northwestern of Zambia in late 2005. The skeletal growth pattern was formed by carbonaceous substance. The bedrock at the Kavungu mine consisted of an impure and distinctly banded marble that has been selectively weathered into a typical karst landform. However most of trapiche tourmaline specimens were only found in these residual laterite. The precise petrologic setting is unknown - quoted from GIA report.

Mineral Data
What's on the rock

Tourmaline

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