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Prehnite & Analcime With Calcite & Quartz

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SMS1040907

Prehnite & Analcime With Calcite & Quartz

Description Tabs

Description
Locality: 
Goboboseb Mountains, Brandberg, Dâures, Erongo Region, Namibia
Class: 
Crystal Group/Cluster
Size Range: 
Small miniature (3-4.5 cm)
Size: 
2.1 × 3.9 × 2.8 cm
Largest Crystal: 
1.90cm
Weight: 
21.66gr
Description

This small specimen has a lot going on. A well formed crystal of prehnite to 1cm. Then a large crystal of clear and white analcime to 9mm across with a rhombic twin of calcite to 1.9cm across. The calcite is an outcrop of intergrown rhombic crystals over epidote. Then inbetween the prehnite and analcime are small elongated clear quartz crystals coming off the matrix.

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

Analcime

Formula: 
Na2(Al2Si4O12)·2H2O
Strunz: 
9.GB.05
Crystal System: 
Triclinic
Hardness: 
5.0 - 5.5
Streak: 
White
Type Locality: 
Cyclopean Islands, Acitrezza (Aci Trezza), Etna Volcanic Complex, Catania Province, Sicily, Italy

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

Current price

$

Starting price

$10
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Start 08 Apr 18:00
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Shipping Information

Postage Area Price
Europe up to 500 grams
$12
Europe up to 1 kilogram
$16
United States up to 500 grams
$14
United States up to 1 kilogram
$18
Rest of world up to 500 grams
$14
Rest of world up to 1 kilogram
$18

Seller Information

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Bid History

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