Kämmererite Value, Price, and Jewelry Information


Kämmerérite
By Didier Descouens (Own work) [CC-BY-3.0], via Wikimedia Commons

Kämmererite is a beautiful but rare mineral. It is micaceous; consequently, it is extraordinarily difficult to facet, which has severely limited the availability of cut gems. It would have to be handled with great care to avoid cleaving. A few clean, well-cut gems do Perfect basal cleavage; micaceous; laminae exist, nonetheless, a testimony to the perseverance of hobbyists!

Kämmererite Value

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Kämmererite Information

DataValue
NameKämmererite
Is a Variety ofClinochlore
Crystallography Triclinic; crystals hexagonal shape, bounded by steep sided pyramids.
Colors Red to purplish red, cranberry red.
Luster Vitreous; pearly on cleavages.
Fracture Micaceous; laminae flexible.
Hardness 2-2.5.
Specific Gravity 2.64
Birefringence 0.003
Cleavage Perfect basal cleavage.
Stone SizesFacetable material is quite rare and always small. Minute gems, 1-2 carats, have been cut from Turkish material.
Luminescence None reported.
Spectral Not diagnostic.
Formula(Mg,Cr)6(AISi3)O10(OH)8. (Chlorite Group).
Pleochroism Strong; violet/hyacinth-red.

Optics:  a= 1.597; β= 1.598; γ= 1.599-1.600. Biaxial; optic sign variable.

Occurrence: In chromite deposits, associated with clinochlore and uvarovite.

Erzincan, Turkey: distinct crystals.

Lake Itkul, near Miask, USSR.

California; Texas: Pennsylvania.

Comments: Kämmererite is a beautiful but rare mineral. It is micaceous; consequently, it is extraordinarily difficult to facet, which has severely limited the availability of cut gems. It would have to be handled with great care to avoid cleaving. A few clean, well-cut gems do Perfect basal cleavage; micaceous; laminae exist, nonetheless, a testimony to the perseverance of hobbyists!

Name: After A. Kämmerer, the mining director at St. Petersburg.