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Hyalite

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BMM731473

Hyalite

Description Tabs

Description
Locality: 
Kopasz Hill, Tállya, Zemplén Mountians, Borsod-Abaúj-Zemplén County, Hungary
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.5 × 2.5 × 2.3 cm
Description

Nice specimen of translucent, gemmy opal var. hyalite crystal on gray matrix from Hungary. As you can see on the photo: the lustrous hyalite changes the color under UV light to gorgeous green!

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