Creedite

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Creedite was discovered in the Colorado Fluorspar Co. Mine in 1916. The mine is located in the Creede Quadrangle, Mineral County, Colorado and this was the inspiration for its name. It comes in colorless, orange, purple, violet, and white prismatic crystals that sometime radiate from the base.

Creedite Rough
Creedite Classification
Common Name Creedite
Species Creedite
Creedite Optical Properties
Transparency Opaque-Transparent
Dispersion Strength: Strong Fire
Refractive Index 1.461-1.485
Birefringence 0.024
Optic Character Biaxial
Optic Sign Negative
Creedite Characteristic Physical Properties
Hardness 4
Streak white
Specific Gravity 2.713-2.730
Toughness Poor
Luster Vitreous
Fracture conchoidal
Cleavage perfect
Creedite Chemistry & Crystallography
Chemical Name calcium aluminium sulfate fluoro hydroxide
Chemical Formula Ca3SO4Al2F8(OH)2*2H2O
Crystal System Monoclinic
Chemistry Classification Halide

Creedite Colors

  • Orange Creedite Orange
  • White Creedite White
  • Blue Creedite Blue
  • Colorless Creedite Colorless
  • Purple Creedite Purple

Countries of Origin

Greece; United States of America (the); China; Italy; Mexico; South Africa; Australia; France; Kazakhstan; Tajikistan; Bolivia (Plurinational State of)

Care

Creedite is brittle so please take care when handling specimens.

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Tim Matthews

Author

Tim Matthews

Tim Matthews is President and Chief Executive Officer of Jewelry Television® (JTV), as well as a member of the company's Board of Directors. He oversees and leads all aspects of the company's powerful omni-digital retail platform that uniquely specializes in fine jewelry and gemstones. His passion for business and gemstones has led him to become a recognized expert in the field of gemology. He is a life member of the Gemmological Association of Great Britain (Gem-A) and has earned Gem-A's highest degrees, the Gemmology (FGA) and Diamond (DGA) diplomas. He is also a Graduate Gemologist (GG) of the Gemological Institute of America (GIA) and has also completed GIA's Graduate Diplomas in Diamonds, Colored Stones and Pearls. Under his leadership, JTV has become the leader in the sourcing and selling of color gemstones and jewelry.

This page was created on June 27, 2014.

This page was last edited on October 24, 2019.