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Bertrandite Fluorapatite & Quartz

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PDM712939

Bertrandite Fluorapatite & Quartz

Gem Crystal

Description Tabs

Description
Locality: 
Bom Sucesso #4 Quarry, Chãs de Tavares, Mangualde, Viseu District, Portugal
Class: 
Crystal Group/Cluster
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.9 × 2 × 1.3 cm
Description

Nice aggregate of intergrown attractive transparent tabular bertrandite crystals associated to prismatic transparent quartz and blue coloured fluorapatite crystals. It was found on April 13th 2013 by a well-known Spanish “Strahler” at the Bom Sucesso No. 4 Quarry.

Representative specimen from this uncommon locality that unfortunately is already inaccessible for collectors.

Mineral Data
What's on the rock

Bertrandite

Formula: 
Be4(Si2O7)(OH)2
Strunz: 
9.BD.05
Crystal System: 
Orthorhombic
Hardness: 
6.0 - 7.0
Type Locality: 
Petit-Port, Nantes, Loire-Atlantique, Pays de Loire, France

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

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Crystal System: 
Trigonal
Hardness: 
7.0
Streak: 
White

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