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Magnesio-foitite

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ESM588772

Magnesio-foitite

Type Locality

Description Tabs

Description
Locality: 
Kyonosawa, Yamanashi City, Yamanashi Prefecture, Honshu Island, Japan
Class: 
Crystal Group/Cluster
Size Range: 
Small miniature (3-4.5 cm)
Size: 
1.8 × 3.3 × 2.8 cm
Description

Bluish-grey sprays of acicular magnesio-foitite crystals

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