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Zinnwaldite
Zinnwaldite

Prase Opal
Prase Opal



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Zinnwaldite
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Prase Opal

Physical Properties

Tenacity

Elastic
-

Solubility

-
-

Durability

-
-

Specific Gravity

2.9-3.11.98-2.25
1 7.18
👆🏻

Fracture

Uneven
Conchoidal

Cleavage

Perfect basal {001}
None

Mohs Hardness

3.5-4.05-6.5
2 10
👆🏻

Chemical Composition

-
SiO 2 + H 2OUlrich Henn and Claudio C.