Tenacity
-
Brittle
Solubility
insoluble in water
-
Durability
-
-
Specific Gravity
2.51-2.635.00-5.30
1
7.18
👆🏻
Fracture
Fibrous
Uneven, ConchoidalWalter Schumann, Conchoidal
Cleavage
Perfect basal
None, may show partings on {0001} and {10 1 1}
Mohs Hardness
2.5-4.56
2
10
👆🏻
Chemical Composition
Mg 3(Si 2O 5)(OH) 4Gemdat.org , Management Team (2012)
Fe 2O 3Arthur Thomas , Gemstones (2009)