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Prehnite On Quartz

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PMN643406

Prehnite On Quartz

Description Tabs

Description
Locality: 
Imilchil, Errachidia Province, Drâa-Tafilalet Region, Morocco
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
6 × 7 × 4.2 cm
Largest Crystal: 
4.20cm
Weight: 
153.00gr
Description

From the 2016 finds comes this representative specimen of prehnite with quartz. This piece has bright, lustrous quartz as opposed to some of the ones with hematite staining and sits up nicely for display. It has some grey mineralisation on the back of the sphere but no damage at all.

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

Quartz

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