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Milarite

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CR132918

Milarite

Rare Mineral

Description Tabs

Description
Locality: 
Valenciana Mine, Guanajuato, Guanajuato Municipality, Guanajuato, Mexico
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.2 × 4.2 × 1.8 cm
Largest Crystal: 
0.60cm
Description

Excellent gemmy yellow-green hexagonal milarite crystals intergrown with white adularia. The locals call this adularia Valencianite, as its lustre and sharp rhombohedral form with a bit of a curve make it distinct from normal adularias crystals.The largest of the Milarites is 6 mm across and is classic for this famous locality from old finds of the 1960sEx Hoffmann collection.

Mineral Data
What's on the rock

Milarite

Formula: 
K2Ca4Al2Be4Si24O60·H2O
Strunz: 
9.CM.05
Hardness: 
6.0
Type Locality: 
Giuv Valley, Tujetsch (Tavetsch), Vorderrhein Valley, Grischun (Grisons; Graubünden), Switzerland