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Opal

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MGR1157391

Description Tabs

Description
Locality: 
Mogadouro, Bragança District, Portugal
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.9 × 4.5 × 3.2 cm
Description

Wonderful matrix specimen of opal from Portugal. The light beige to dark matrix hosts a striking, well-sized aggregate of deep red opal at the top center, creating an excellent contrast. A truly attractive piece from this locality.

Mineral Data
What's on the rock

Opal

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