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Opal & Fluorapatite

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RGR811331

Opal & Fluorapatite

Description Tabs

Description
Locality: 
Valeč, Doupov, Karlovy Vary Region, Czech Republic
Class: 
Massive/Crystalline
Size Range: 
Miniature (4.5-7 cm)
Size: 
5 × 4 × 3 cm
Description

Lovely aesthetics and brilliant luster highlight this 2 cm flower of Hyalite Opal. Very nice combination specimen of Hyalite (opal-AN) and Fluorapatite crystals (var. Carbonate rich, Staffelite) on volcanic matrix from Valec Hyalite is perfect 3-dimensional spray, clear and lustrous sharp. Fluorapatite is very rare this big crystals.  This beautiful and good quality example.

Mineral Data
What's on the rock

Opal

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

Fluorapatite

Formula: 
Ca2Ca3(PO4)3F
Strunz: 
8.BN.05
Crystal System: 
Hexagonal
Hardness: 
5.0
Streak: 
White
Type Locality: 
Sauberg Mine, Ehrenfriedersdorf, Erzgebirge, Saxony, Germany