Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.14-3.164.95-5.0
1
7.18
👆🏻
Fracture
Conchoidal
Uneven
Cleavage
Perfect on {010} and {110}
Imperfect to indistinct on {10 1 0}, parting on {0001}
Mohs Hardness
5-5.54-5
2
10
👆🏻
Chemical Composition
MgF 2Ulrich Henn and Claudio C.
(Ce,La)(CO 3)FMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references