1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.52-2.602.98-3.03
1
7.18
1.5 Fracture
Uneven, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Metallic
Uneven
1.6 Cleavage
{0001} Imperfect, {1120} Imperfect
[110] perfect; [010] distinct
1.7 Mohs Hardness
1.8 Chemical Composition
KCa 2AlBe 2Si 12O 30 · 0.5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Ca 2Mg 5Si 8O 22(OH) 2Ulrich Henn and Claudio C.