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Hyalite & Staffelite

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MNR754241

Hyalite & Staffelite

Classic Locality

Description Tabs

Description
Locality: 
Valeč, Doupov, Karlovy Vary Region, Czech Republic
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.5 × 2.6 × 1.8 cm
Description

Damage-free hyalite (opal-AN) from it's classic European locality. Great shape and cleaness of this hyalite (opal-AN) along with white well-shaped crystals of staffelite association makes it real beauty.

The sample has well balanced proportion of opal-AN to andesite matrix.

Mineral Data
What's on the rock

Hyalite

Variety Of: 

Opal

Formula: 
SiO2·nH2O
Strunz: 
4.DA.10
Hardness: 
5.5 - 6.5
Formula: 
SiO2·nH2O
Hardness: 
5.5 - 6.5
Streak: 
white

Staffelite

Variety Of: 

Carbonate-rich Fluorapatite

Formula: 
Ca5(PO4,CO3)3(F,O)
Strunz: 
8.BN.05
Hardness: 
5.0