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  • Creedite

Creedite

Creedite

By Tim Matthews, JD, FGA, GG, DGA,
CEO and President of JTV
Published: June 2014
Modified: October 2021
Creedite Rough
Table of Contents
  • General Information
  • Creedite Colors
  • Countries of Origin
  • Care

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.

General Information

  • Classification
  • Optical Properties
  • Characteristic Physical Properties
  • Chemistry & Crystallography
Common Name
Creedite
Species
Creedite
Transparency
Opaque-Transparent
Dispersion
Strength: Strong Fire
Refractive Index
1.461-1.485
Birefringence
0.024
Optic Character
Biaxial
Optic Sign
Negative
Hardness
4
Streak
white
Specific Gravity
2.713-2.730
Toughness
Poor
Luster
Vitreous
Fracture
conchoidal
Cleavage
perfect
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; Unknown; China; United States of America; 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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