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Prehnite Calcite & Quartz

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SKI172432

Prehnite Calcite & Quartz

Description Tabs

Description
Locality: 
Malad Quarry, Mumbai, Maharashtra, India
Size Range: 
Cabinet (10-18 cm)
Size: 
11 × 10.5 × 2.6 cm
Largest Crystal: 
0.80cm
Description

Chocolate brown calcite crystals and whiteish prehnite on prismatic waterclear quartz. An older specimen from malad quarry. Some of the calcites with damages.

Mineral Data
What's on the rock

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

Calcite

Polymorph of: 
Formula: 
CaCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.0
Streak: 
White

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Crystal System: 
Trigonal
Hardness: 
7.0
Streak: 
White

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