Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.52-2.602.50-2.80
1
7.18
👆🏻
Fracture
Uneven, Conchoidal
-
Cleavage
{0001} Imperfect, {1120} Imperfect
Perfect
Mohs Hardness
5.5-65-6.5
2
10
👆🏻
Chemical Composition
KCa 2AlBe 2Si 12O 30 · 0.5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Na 4(Al,Si) 12O 24Cl to Ca 4(Si,Al) 12O 24(CO 3,SO 4)Arthur Thomas , Gemstones (2009)