Creedite Value, Price, and Jewelry Information


faceted creedite - Chihuahua, Mexico
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. Too soft to wear, this strictly collector's gem occurs in attractive white, purple, and orange colors.

Creedite Value

The International Gem Society (IGS) has a list of businesses offering gemstone appraisal services.

Creedite Information

DataValue
NameCreedite
Crystallography Monoclinic. Crystals short, prismatic; also radial clusters.
Colors Colorless, white, rose to lilac or purple, orange.
Luster Vitreous.
Fracture Fracture conchoidal. Brittle.
Hardness 4
Specific Gravity 2.71 -2.73
Birefringence 0.024
Cleavage Perfect 1 direction.
Dispersion Moderate
Luminescence Medium white to cream color (SW); bright white to cream (LW).
Spectral Not diagnostic.
Transparency Opaque to transparent.
FormulaCa­3AI2(SO4)(F,OH)10 • 2H2O.
Optics a = 1.461; β = 1.478; γ = 1.485. Biaxial (-), 2V = 64°.
EtymologyAfter the type locality, Creede Quadrangle, Colorado.
OccurrenceFluorite-rich hydrothermal mineral deposits.
creedite crystal - Chihuahua, Mexico
“Creedite,” West Camp, Santa Eulalia, Chihuahua, Mexico, 4.3 x 3.2 x 2.7 cm, amethystine colored crystals. © Rob Lavinsky, www.iRocks.com. Used with permission.

Comments

Transparent colorless 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.

Synthetics

No known synthetics or enhancements.

Sources

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 - Durango, Mexico.
“Creedite,” Abasolo Mine, Navidad, Durango, Mexico, 5.1 x 4.4 x 4.0 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).

Care

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. See our gemstone jewelry care guide for cleaning recommendations.

creedite - Kazakhstan
“Creedite,” Akchatau Mine, Karaganda Oblast, Kazakhstan, 3.2 x 2.3 x 1.9 cm. © Rob Lavinsky, www.iRocks.com. Used with permission.