Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.54-2.783.95-4.10
1
7.18
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Fracture
Conchoidal
Uneven
Cleavage
Good in three directions
{110} Perfect, {110} Perfect, {110} Perfect
Mohs Hardness
5-63.5-4
2
10
👆🏻
Chemical Composition
K(Ca,Na) 2Si 4O 10(OH,F) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(Zn,Fe)SMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references