Wilkeite Value, Price, and Jewelry Information

Rob Lavinsky, iRocks.com – CC-BY-SA-3.0 [CC-BY-SA-3.0], via Wikimedia Commons

An overview on Wilkeite Jewelry and Gemstones. Covers details and essential information on the physical properties and characteristics of Wilkeite gems.

Wilkeite Value

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

Wilkeite Information

Is a Variety ofApatite
Crystallography Hexagonal. Crystals rounded; granular; massive.
Refractive Index 1.636-1.650
Colors Pale pinkish, yellowish, rose red.
Luster Vitreous to resinous.
Hardness 5
Specific Gravity 3.12-3.23
Birefringence 0.010
Cleavage Imperfect
Stone SizesCuttable crystal fragments have been encountered, but I know of no faceted gems.
Luminescence None reported.
Transparency Transparent to translucent.
Absorption Spectrum Not diagnostic.
Optics o = 1.640-1.650; e = 1.636-1.646. Uniaxial (-).

Apatite Group.

Occurrence: In metamorphosed marbles.

Kyshtym, Urals, USSR; Laacher See, Germany.

Crestmore, California in marble.

Comments: Wilkeite is a rare silicate—sulfate apatite that has not been encountered as faceted gems; however. I have seen cuttable crystals that would yield stones in the 1-5 carat range. These would be extremely rare stones.

Name: After R. M. Wilke, mineral collector and dealer in Palo Alto, California.