Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.52-2.603.76-3.77
1
7.18
👆🏻
Fracture
Uneven, Conchoidal
-
Cleavage
{0001} Imperfect, {1120} Imperfect
{110} Perfect, {110} Perfect
Mohs Hardness
5.5-65-6
2
10
👆🏻
Chemical Composition
KCa 2AlBe 2Si 12O 30 · 0.5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(Fe,Mn) 7Si 7O 21Ulrich Henn and Claudio C.