Wilkeite Value, Price, and Jewelry Information


Wilkeite
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

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Wilkeite Information

DataValue
NameWilkeite
Is a Variety ofApatite
Crystallography Hexagonal. Crystals rounded; granular; massive.
Colors Pale pinkish, yellowish, rose red.
Luster Vitreous to resinous.
Fracture Very brittle.
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.
Spectral Not diagnostic.
FormulaCa5(SiO4PO4SO4)3(O,OH,F).

Apatite Group.

Optics: 0 I l.640—1.650: e = l.636—1.646.

Uniaxial (—).

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.