Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.52-2.604.28-4.42
1
7.18
👆🏻
Fracture
Uneven, Conchoidal
Conchoidal
Cleavage
{0001} Imperfect, {1120} Imperfect
Distinct on [010] and [100] poor on [101]
Mohs Hardness
5.5-65-5.5
2
10
👆🏻
Chemical Composition
KCa 2AlBe 2Si 12O 30 · 0.5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
PbCa 3Zn 4(SiO 4) 4Anthony et al , Handbook of mineralogy (2001)