1 Physical Properties
1.1 Tenacity
2.1 Solubility
slightly water soluble and in hot hydrochloric acid
Not Available
2.4 Durability
Not Available
Not Available
2.7 Specific Gravity
3.00-3.252.58-2.64
1
7.18
2.15 Fracture
Subconchoidal, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references
Gems, Sixth Edition (2006)
2.16 Cleavage
Octahedral, perfect on {111}, parting on {011}
None
2.17 Mohs Hardness
2.18 Chemical Composition
CaF2
SiO2 (with a high level of nickel impurities )