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$89.00
& FREE ShippingA uniquely textured stone coated in tiny radiating shoots of prismatic Creedite crystal, sporadic pockets of purple and green Fluorite, and a "mystery" white mineral inclusion (possibly Scolecite). We think this chunk of Creedite resembles an astronaut posed on his side with his arm resting under his head. Flip him vertically, and he's waiving at you!
Stone of the Light
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
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
The Genius Stone
Common Colors: Blue, Green, Colorless, Purple, Black, Yellow, Pink
Mohs Hardness: 4