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Vivianite

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MGR703086

Vivianite

Description Tabs

Description
Locality: 
Kerch Peninsula, Crimea, Ukraine
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.4 × 4.3 × 4 cm
Description

Very well defined spearlike crystals. They are partly transparent and have a darkt green color, others are just black - but of them are in fine condition and highly lustrous.. They have grown in the shell of a fossil bivalve, which still shows most of it´s details.

Mineral Data
What's on the rock

Vivianite

Formula: 
Fe2+3(PO4)2·8H2O
Strunz: 
8.CE.40
Crystal System: 
Monoclinic
Hardness: 
1.5 - 2.0
Type Locality: 
Wheal Kind (Wheal Kine), West Wheal Kitty group, St Agnes, St Agnes District, Cornwall, England, UK