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Fluorapatite Calcite & Opal

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RSL567124

Fluorapatite Calcite & Opal

Fluorescent

Description Tabs

Description
Locality: 
Cerro de Mercado Mine, Victoria de Durango, Durango, Mexico
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.2 × 5.5 × 5 cm
Largest Crystal: 
2.00cm
Description

Nice fluorapatite crystals with well defined faces and edges, included in a calcite matrix with opal (green fluorescence SW-UV) which provides a pretty contrast. They show hexagonal prisms of different order and defined terminal faces. Transparence and intense yellow-gree colour. With small inclusions of hematite. Under magnification we can see some small damages, not reducing aesthetics. A gemmy specimen. 

Mineral Data
What's on the rock

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

Calcite

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

Opal

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