1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.55-2.632.24-2.29
1
7.18
1.5 Fracture
Uneven, Uneven, Gems
Uneven, Subconchoidal, Uneven, Subconchoidal, Conchoidal, Brittle
1.6 Cleavage
{001} Perfect, {010} Good
Very poor [100]
1.7 Mohs Hardness
1.8 Chemical Composition
KAlSi 3O 8Arthur Thomas , Gemstones (2009)
NaAlSi 2O 6 · H 2OMichael OâDonoghue , Gems, Sixth edition (2006) More from other references