Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.52-2.602.74-2.76
1
7.18
👆🏻
Fracture
Uneven, Conchoidal
Uneven
Cleavage
{0001} Imperfect, {1120} Imperfect
{010} Perfect, {001} Distinct
Mohs Hardness
5.5-63.5-4
2
10
👆🏻
Chemical Composition
KCa 2AlBe 2Si 12O 30 · 0.5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Fe3+ PO 4 · 2H 2OAnthony et al , Handbook of Mineralogy (2001)