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Opal

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PDM655425

Opal

Fluorescent

Description Tabs

Description
Locality: 
Verdadera Mine, Valdemoro, El Verdugal, Guadalix de la Sierra, Madrid, Spain
Class: 
Massive/Crystalline
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.7 × 5.4 × 3.7 cm
Description

Self-collected opal at a very uncommon locality, Valdemoro (Madrid) from the continental paleolake deposits of the Lower Miocene. Under long wave UV illumination this opal displays a strong green fluorescence, as shown in the first pictures. Nice!.

Found in 2002.

Mineral Data
What's on the rock

Opal

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

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