Tenacity
Solubility
Durability
Specific Gravity
Fracture
Cleavage
Mohs Hardness
Chemical Composition
Na 8Al 6Si 6O 24(SO 4) · H 2OAnthony et al , Handbook of Mineralogy (2001)
{111} Indistinct, {111} Indistinct, {111} Indistinct
Fe2+ Al 2O 4Gemdat.org , Management Team (2012)