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Opal

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PCZ550443

Opal

Description Tabs

Description
Locality: 
Szklary, Ząbkowice Śląskie County, Lower Silesian Voivodeship, Poland
Class: 
Massive/Crystalline
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4.2 × 2.8 × 1.8 cm
Description

I'm offering these two opal specimens as a pair because of the great contrast between them. They are as different as 'black and white'. The images do not accurately represent them as photography was difficult. Truly jet black and snow white. The location and dimensions are for the white material while the black is from Silesia Region, Slovakia and is 4.0 x 3.0 x 2.3 cm. Last pair.

Mineral Data
What's on the rock

Opal

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