An overview on Wilkeite Jewelry and Gemstones. Covers details and essential information on the physical properties and characteristics of Wilkeite gems.
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|Is a Variety of||Apatite|
|Crystallography||Hexagonal. Crystals rounded; granular; massive.|
|Colors||Pale pinkish, yellowish, rose red.|
|Luster||Vitreous to resinous.|
|Cleavage||Imperfect: very brittle.|
|Stone Sizes||Cuttable crystal fragments have been encountered, but I know of no faceted gems.|
Optics: 0 I l.640—1.650: e = l.636—1.646.
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.