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Schorl

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FRN99705

Schorl

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Description
Locality: 
Gilgit, Gilgit-Baltistan, Pakistan
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.7 × 4.4 × 3.1 cm
Description

Cluster of lustrous black schorl tourmaline crystals with three-faced pyramidal terminations and striated prism faces associated with muscovite blades and cream feldspar

Mineral Data
What's on the rock

Schorl

Formula: 
Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Strunz: 
9.CK.05
Hardness: 
7.0
Oriental Minerals