Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.95-4.106.50-7.00
1
7.18
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Fracture
Uneven
Irregular, Conchoidal
Cleavage
{110} Perfect, {110} Perfect, {110} Perfect
On {011}, distinct; on {001}, {013}, indistinct
Mohs Hardness
3.5-43
2
10
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Chemical Composition
(Zn,Fe)SMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
PbMoO 4Walter Schumann , Gemstones of the world (2001)