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Vivianite & Muscovite

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MGR822818

Vivianite & Muscovite

Classic Locality

Description Tabs

Description
Locality: 
Conselheiro Pena, Minas Gerais, Brazil
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4.1 × 2.8 × 2.5 cm
Description

Vrey old, bery rare! Vivianite from the locality is an out-standing rarity and the combination with muscovite is unique world-wide. With only minor backlight the crystal shows wonderful steps og dark blue, cyan and green color. The crystal is well shaped and end-pointed (end points consists of tiny steps), the assemble looks great 360°.

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

Muscovite

Formula: 
KAl2(AlSi3O10)(OH)2
Strunz: 
9.EC.15
Hardness: 
2.5
Streak: 
White