Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.60-2.644.95-5.0
1
7.18
👆🏻
Fracture
Uneven, Splintery, Conchoidal
Uneven
Cleavage
Absent
Imperfect to indistinct on {10 1 0}, parting on {0001}
Mohs Hardness
6.5-74-5
2
10
👆🏻
Chemical Composition
SiO 2Arthur Thomas , Gemstones (2009)
(Ce,La)(CO 3)FMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references