Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.65-4.552.55-2.63
1
7.18
👆🏻
Fracture
Conchoidal
Uneven
Cleavage
None, but may exhibit slight parting
{001} Perfect, {010} Good
Mohs Hardness
7.5-86-6.5
2
10
👆🏻
Chemical Composition
(Mg,Zn)Al 2O 4Gemdat.org , Management Team (2012)
KAlSi 3O 8Arthur Thomas , Gemstones (2009)