Creedite Value, Price, and Jewelry Information

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Creedite: Chihuahua, Mexico (0.96). Photo © Joel E. Arem, PhD, FGA. Used with permission.

Probably fewer than a dozen creedite gems have ever been faceted. This rare mineral is rarer still as a cuttable crystal.

Creedite Information

Data Value
Name Creedite
Formula Ca­3AI2(SO4)(F,OH)10 • 2H2O
Etymology After the type locality, Creede Quadrangle, Colorado.
Occurrence Fluorite-rich hydrothermal mineral deposits.
Colors Colorless, white, rose to lilac or purple, orange.
Fracture Conchoidal
Hardness 4
Cleavage Perfect 1 direction
Wearability Display only
Crystallography Monoclinic. Crystals short, prismatic; also radial clusters.
Refractive Index 1.461-1.485
Birefringence 0.024
Dispersion Moderate
Luminescence Medium white to cream color (SW); bright white to cream (LW).
Luminescence Present Yes
Luminescence Type Fluorescent, UV-Long, UV-Short
Absorption Spectrum Not diagnostic
Optics a = 1.461; β = 1.478; γ = 1.485. Biaxial (-), 2V = 64°.
Optic Sign Biaxial -
Luster Vitreous
Specific Gravity 2.71-2.73
Transparency Transparent to opaque
creedite crystal - Chihuahua, Mexico

Amethystine colored creedites, West Camp, Santa Eulalia, Chihuahua, Mexico, 4.3 x 3.2 x 2.7 cm. © Rob Lavinsky, www.iRocks.com. Used with permission.

What Colors are Creedite Gemstones?

Transparent colorless, white, rose, and purple material from Chihuahua, Mexico has yielded rare facetable creedites. In recent decades, new sources have produced more material in more colors, such as orange.

creedite - Durango, Mexico.

Orange creedites, Abasolo Mine, Navidad, Durango, Mexico, 5.1 x 4.4 x 4.0 cm. © Rob Lavinsky, www.iRocks.com. Used with permission.

Do Creedites Make Good Jewelry Stones?

You’re more likely to find creedite gems in a mineral collection, if at all, than a jewelry collection. With perfect cleavage and a low hardness of 4, creedites wouldn’t make durable jewelry stones. A sensitivity to acid makes it inadvisable to wear or handle these gems for long periods. Creedites are strictly collector’s gemstones for display only.

Are There Synthetic Creedites?

There are no known synthetic creedites or enhancements for these gems.

Where is Creedite Found?

The classic source for gemmy material, Santa Eulalia, Chihuahua, Mexico produces crystals up to 1 inch long.

Durango, Mexico has produced stunning, bright orange crystals.

Other notable sources include:

  • United States: Darwin, California; Creede, Colorado (in cavities in rock with fluorite and barite); Wagon Wheel Gap, Colorado (in a fluorite-barite mine); Granite, Nevada.
  • Colquiri, Bolivia; China (colorless); Kazakhstan (purple).
creedite - Kazakhstan

Purple creedites, Akchatau Mine, Karaganda Oblast, Kazakhstan, 3.2 x 2.3 x 1.9 cm. © Rob Lavinsky, www.iRocks.com. Used with permission.

Stone Sizes

Any faceted gems are very small, usually less than 1-2 carats.

  • Private Collection: 0.96 (purple, Chihuahua).

Caring for Your Creedites

Clean these gemstones only with a soft brush, mild detergent, and warm water. See our gemstone jewelry care guide for cleaning recommendations.

credits - China

Radiating cluster of transparent creedite crystals on matrix, Quinglong Co. Guizhou, China. Photo courtesy of liveauctioneers.com and Jasper52.

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