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Paraniite-(Y) & Powellite

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SKY610824

Paraniite-(Y) & Powellite

Rare Mineral

Description Tabs

Description
Locality: 
Fianel, Ausserferrera, Ferrera Valley, Hinterrhein, Grisons, Switzerland
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.5 × 2 × 1.5 cm
Description

Yellow powellite crystals where microscopic inclusions of the extremely rare mineral paraniite-(Y) have been found hidden in the microfractures. Individual paraniite-(Y) crystals are extremely small and not visible under the microscope. 

Paraniite-(Y) is a very rare yttrium-tungsten mineral only known from a four localities worldwide

Mineral Data
What's on the rock

Paraniite-(Y)

Formula: 
Ca2Y(AsO4)(WO4)2
Strunz: 
7.GA.15
Crystal System: 
Tetragonal
Hardness: 
0.0
Type Locality: 
Mt Cervandone (Scherbadung; Cherbadung), Devero Alp, Baceno, Devero Valley, Antigorio Valley, Ossola Valley, Verbano-Cusio-Ossola Province, Piedmont, Italy

Powellite

Formula: 
Ca(MoO4)
Strunz: 
7.GA.05
Crystal System: 
Tetragonal
Hardness: 
3.5 - 4.0
Type Locality: 
Peacock Mine (South Peacock; Darland; Peacock & South Peacock), Cuprum, Seven Devils District, Adams Co., Idaho, USA

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