Item Description
This gorgeous Creedite specimen boasts two incredibly differing personalities on either side of the stone. One side features larger, but more of the typical prismatic shoots of Creedite, while the other side is a new world of caverns and spectacular, glittering druzy. It's remarkably reminiscent of flipping over a sea urchin. Yes - all the photos you see are of the same Creedite specimen!
Creedite
Stone of the Light
Properties of Creedite
Physical Properties
Category:
Halides
Chemical Formula:
Ca3SO4Al2F8(OH)2•2H2O
Crystal Class:
Prismatic
Crystal System:
Monoclinic
Name:
Creedite
Space Group:
C2/c
Strunz Classification:
3.CG.15
Unit Cell:
a = 13.91 Å, b = 8.58 Å, c = 10 Å; β = 94.4°; Z = 4
Mineral Identification
Birefringence: δ = 0.024
Cleavage: Perfect {100}
Common Colors: Colorless, Orange, Purple
Diaphaneity: Transparent to translucent
Fracture: Conchoidal
Luster: Vitreous
Mohs Hardness: 4
Optical Properties: Biaxial (-)
Refractive Index: nα = 1.461 nβ = 1.478 nγ = 1.485
Streak: White
Tenacity: Brittle