Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.95-4.103.02
1
7.18
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Fracture
Uneven
Uneven, Conchoidal
Cleavage
{110} Perfect, {110} Perfect, {110} Perfect
{0001} Poor
Mohs Hardness
3.5-4-9999
2
10
👆🏻
Chemical Composition
(Zn,Fe)SMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Ca(Li 2Al)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)