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Hyalite

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PDM612317

Hyalite

Fluorescent

Description Tabs

Description
Locality: 
Bom Sucesso #4 Quarry, Chãs de Tavares, Mangualde, Viseu District, Portugal
Class: 
Massive/Crystalline
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4.2 × 3.6 × 1 cm
Description

Globular and botryoidal mass of opal-AN (hyalite) on a matrix of granite rock. It shows a strong green fluorescence in long and short UV light. Found in 2015.

Mineral Data
What's on the rock

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

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