Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.52-2.602.45
1
7.18
👆🏻
Fracture
Uneven, Conchoidal
Conchoidal
Cleavage
{0001} Imperfect, {1120} Imperfect
Perfect on {001}, good on {110}
Mohs Hardness
5.5-64-4.5
2
10
👆🏻
Chemical Composition
KCa 2AlBe 2Si 12O 30 · 0.5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
KNa 4Ca 4Si 8O 18(CO 3) 4(OH,F) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)