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Apatite With Hyalite Opal & Calcite

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PCZ130857

Apatite With Hyalite Opal & Calcite

Description Tabs

Description
Locality: 
Cerro de Mercado Mine, Victoria de Durango, Durango, Mexico
Size Range: 
Miniature (4.5-7 cm)
Size: 
5 × 4.5 × 3.5 cm
Description

A very pleasing specimen with a number of apatite crystals. The main crystal is well terminated, transparent, and 0.8 x 0.8cm in dimension. The matrix also exhibits translucent colourless growths of calcite and hyalite opal. The calcite fluoresces a pale green while the hyalite fluoresces an intense green (SW-pictured). A lovely little combination piece.

Mineral Data
What's on the rock

Apatite

Synonym Of: 

Chlorapatite

Formula: 
Ca5(PO4)3Cl
Strunz: 
8.BN.05
Hardness: 
5.0

Fluorapatite

Formula: 
Ca2Ca3(PO4)3F
Strunz: 
8.BN.05
Hardness: 
5.0

Hydroxylapatite

Formula: 
Ca5(PO4)3(OH)
Strunz: 
8.BN.05
Hardness: 
5.0
Crystal System: 
Hexagonal
Hardness: 
5

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

Opal

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

Calcite

Polymorph of: 
Formula: 
CaCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.0
Streak: 
White
Peter Crozier Minerals