Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.98-4.042.55-2.63
1
7.18
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Fracture
Conchoidal
Uneven
Cleavage
Imperfect, poor one {100}
{001} Perfect, {010} Good
Mohs Hardness
4.5-56-6.5
2
10
👆🏻
Chemical Composition
Zn 2(AsO 4)(OH) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
KAlSi 3O 8Arthur Thomas , Gemstones (2009)