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Putnisite & Millerite

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SKY553404

Putnisite & Millerite

Rare Mineral

Description Tabs

Description
Locality: 
Armstrong Mine, Widgiemooltha, Coolgardie Shire, Western Australia, Australia
Class: 
Crystals on Matrix
Size Range: 
Micromount (under 1cm)
Size: 
0.2 × 0.1 × 0.1 cm
Description

Extremely rare new mineral approved in 2012 (IMA 2011-106) that occurs in this sample as violet crystals and aggregates . The mineral is Sr-Ca-Cr sulphate-carbonate. Only two localities worldwide are known where this mineral occurs !. For more info see Lapis nº5 May 2014 p. 39. Don't miss the opportunity to get such an extreme rarity.

Mineral Data
What's on the rock

Putnisite

Formula: 
SrCa4Cr3+8(CO3)8SO4(OH)16·23H2O
Hardness: 
1.0 - 2.0
Streak: 
Pink
Type Locality: 
Polar Bear peninsula (Lake Cowan), Norseman, Dundas Shire, Western Australia, Australia

Millerite

Formula: 
NiS
Strunz: 
2.CC.20
Crystal System: 
Trigonal
Hardness: 
3.0 - 3.5
Type Locality: 
Jáchymov (St Joachimsthal), Jáchymov District (St Joachimsthal), Krušné Hory Mts (Erzgebirge), Karlovy Vary Region, Bohemia (Böhmen; Boehmen), Czech Republic

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