1 Physical Properties
1.1 Tenacity
Very brittle
Not Available
1.2 Solubility
insoluble
Partially soluble in water
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.4 Fracture
Conchoidal, Brittle, Conchoidal
Not Available
2.5 Cleavage
{010} perfect, {110} distinct, {100} in traces
Perfect on {10 1 0}
2.6 Mohs Hardness
2.9 Chemical Composition
AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references
Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)