1 Physical Properties
1.1 Tenacity
1.2 Solubility
slightly water soluble and in hot hydrochloric acid
H 2 SO 4
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
3.00-3.252.74-3.00
1
7.18
1.5 Fracture
Subconchoidal, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references
Uneven, UnevenArthur Thomas, Gemstones (2009)
1.6 Cleavage
Octahedral, perfect on {111}, parting on {011}
Distinct on {0001} imperfect on {11 2 0}
1.7 Mohs Hardness
1.8 Chemical Composition
CaF2
Na 4(Ca,Ce) 2(Fe,Mn,Y)ZrSi 8O 22(OH,Cl) 2Ulrich Henn and Claudio C.