1 Physical Properties
1.1 Tenacity
1.2 Solubility
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.52-2.602.20-2.40
1
7.18
1.7 Fracture
Uneven, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Metallic
Conchoidal, Splintery, Fibrous, UnevenArthur Thomas, Gemstones (2009)
1.8 Cleavage
{0001} Imperfect, {1120} Imperfect
Perfect on {010}, distinct on {100}
1.9 Mohs Hardness
1.13 Chemical Composition
KCa 2AlBe 2Si 12O 30 · 0.5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
CaSO 4 -2(H 2O)Arthur Thomas , Gemstones (2009)