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Magnesio-foitite

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CHA771919

Magnesio-foitite

Rare Mineral

Description Tabs

Description
Locality: 
Kyonosawa, Yamanashi City, Yamanashi Prefecture, Honshu Island, Japan
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
1.3 × 1 × 0.6 cm
Description

specimen with many aggregates of gray prismatic tiny crystals of magnesio-foitite on matrix.

 

Mineral Data
What's on the rock

Magnesio-foitite

Formula: 
(□,Na)(Mg2Al)Al6(Si6O18)(BO3)3(OH)3(OH)
Strunz: 
9.CK.05
Crystal System: 
Trigonal
Hardness: 
7.0
Type Locality: 
Kyonosawa, Mitomi-mura, Yamanashi prefecture, Chubu region, Honshu Island, Japan

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