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Prismatine

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SYA969273

Prismatine

Classic Locality

Description Tabs

Description
Locality: 
Stakholmen Quarry, Hassela, Nordanstig, Gävleborg County, Sweden
Class: 
Crystal Group/Cluster
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.5 × 4 × 2.5 cm
Largest Crystal: 
5.50cm
Description

Well-formed, pale bluish-grey colored,  prismatic crystals of prismatine associated with cream colored mica.

Very good specimen for the mineral.

Mineral Data
What's on the rock

Prismatine

Formula: 
([ ],Fe,Mg)(Mg,Al,Fe)5Al4Si2(Si,Al)2(B,Si,Al)(O,OH,F)22
Strunz: 
9.BJ.50
Crystal System: 
Orthorhombic
Hardness: 
6.5 - 7.0
Type Locality: 
Granulite outcrop, Waldheim, Döbeln, Saxony, Germany

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