Tenacity
Solubility
Durability
Specific Gravity
Fracture
Cleavage
Mohs Hardness
Chemical Composition
Ca 10Mg 2Al 4(SiO 4) 5(Si 2O 7) 2(OH) 4Ulrich Henn and Claudio C.
{110} Distinct, {001} Indistinct, {100} Indistinct
PbCrO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references