1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
slightly water soluble and in hot hydrochloric acid
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
3.15-3.213.00-3.25
1
7.18
2.5 Fracture
Gemstones of the world (2001), UnevenWalter Schumann, Gemstones of the world (2001)
Subconchoidal, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references
2.6 Cleavage
1,2 prismatic
Octahedral, perfect on {111}, parting on {011}
2.7 Mohs Hardness
2.11 Chemical Composition