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Quartz Over Malachite

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SMS1069471

Quartz Over Malachite

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Description
Locality: 
Tenke-Fungurume Area, Kolwezi, Lualaba, DR Congo
Class: 
Crystal Group/Cluster
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.3 × 4.7 × 3.6 cm
Weight: 
108.77gr
Description

The specimen has botryoidal druse quartz formations grown over a botryoidal malachite formation. The underside has drusy quartz lining shallow recesses in smaller crystals over hematite included in the quartz matrix mix. There are a couple of abrasions on the quartz drusy and one malachite botryoid has come off.

Mineral Data
What's on the rock

Quartz

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

Malachite

Formula: 
Cu2(CO3)(OH)2
Strunz: 
5.BA.10
Crystal System: 
Monoclinic
Hardness: 
3.5 - 4.0

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