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
1.5 Fracture
ConchoidalGemdat.org, Uneven
Splintery, UnevenArthur Thomas, Difficult, Fibrous
1.6 Cleavage
{111} Indistinct, {111} Indistinct, {111} Indistinct
Good on [110]
1.7 Mohs Hardness
1.8 Chemical Composition
Fe2+ Al 2O 4Gemdat.org , Management Team (2012)
NaAlSi 2O 6Ulrich Henn and Claudio C.