Origin
Turkey, Russia, Canada
Australia, Italy
Color
Reddish, Brown
Yellow, Red, Reddish, Brown, Colorless, White, gray
Specific Gravity
4.95-5.0
2.6-2.9
Fracture
Uneven
Conchoidal, Uneven
Cleavage
Imperfect to indistinct on {10 1 0}, parting on {0001}
On {0001}, perfect
Chemical Composition
(Ce,La)(CO 3)FMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
KAl3(SO4)2(OH)6
Luster
Vitreous, Greasy, Pearly
Vitreous, Pearly
Refractive Index
1.717-1.722
1.572
Crystal System
Hexagonal
Trigonal
Birefringence
0.100
0.020
Clarity
TransparentUlrich Henn and Claudio C. Milisenda
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Psychology
Creativity
Stability
Healing
Physical healing
Emotional healing
Qualities Associated
Creativity
Stability