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Tanzanite & Prehnite

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SKY213808

Tanzanite & Prehnite

Type locality-Rare Mineral
Classic Locality

Description Tabs

Description
Locality: 
Merelani Hills, Arusha Region, Tanzania (United Republic)
Size Range: 
Thumbnail (1-3cm)
Size: 
1.5 × 1 × 1 cm
Description

Clear violet crystal of tanzanite on a globular aggregate of greenish yellow prehnite. Unusual combination of these two species in the same specimen!. Nice contrast of two colorful minerals from this classic locality for tanzanites.

Mineral Data
What's on the rock

Tanzanite

Variety Of: 

Zoisite

Formula: 
{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Strunz: 
9.BG.10
Hardness: 
6.0 - 7.0
Type Locality: 
Merelani Hills, Arusha Region, Tanzania

Prehnite

Formula: 
Ca2Al2Si3O10(OH)2
Strunz: 
9.DP.20
Hardness: 
6.0 - 6.5
Streak: 
White
Type Locality: 
Karoo dolerites, Cradock, Chris Hani District, Eastern Cape Province, South Africa

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