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Bertrandite & Quartz

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TPX858780

Bertrandite & Quartz

Rare Mineral

Description Tabs

Description
Locality: 
Ràs Quarry, Aguiar da Beira, Guarda District, Portugal
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.5 × 6 × 3.8 cm
Weight: 
185.00gr
Description

Very interesting group of smoky quartz crystals with feldspar crystals on a pegmatite matrix in which bertrandite and hyalite opal stand out, which was characteristic of this quarry, this opal is highly fluorescent in green color under long-wave ultraviolet light. to the presence of uranium in the area. This quarry was working for a very short time and today it is stopped and abandoned.

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

Quartz

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

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