Jeremejevite

saf-ahyuh r

Jeremejevite was named for a Russian mineralogist in 1883, but there are rarely any specimens found in Russia today. Recently Namibia has started to produce some mentionable crystals, but in such small amounts the stone is still very rare. Jeremejevite is typically found in pale blue-green, cornflower-blue to yellowish brown hues.

Jeremejevite Polished
Jeremejevite Classification
Common Name Jeremejevite
Species Jeremejevite
Jeremejevite Optical Properties
Transparency Transparent
Refractive Index 1.640-1.651
Tolerance:(+0.002/-0.001)
Birefringence 0.009
Optic Character Uniaxial and Biaxial
Optic Sign Negative
Polariscope Reaction Doubly Refractive (DR)
Fluorescence SWUV: Inert
LWUV: Inert
Pleochroism Dichroic, strong blue and near colorless
Jeremejevite Characteristic Physical Properties
Hardness 6.5-7.5
Streak White
Specific Gravity 3.270-3.310
Toughness Poor
Inclusions Jeremejevite often shows banding or growth related color zoning and occasionally step-like growth zoning that looks like lightning bolts. Stones can have natural inclusions, fingerprints and healing feathers.
Luster Vitreous
Fracture Conchoidal
Cleavage None
Jeremejevite Chemistry & Crystallography
Chemical Name aluminum borate fluoride hydroxide
Chemical Formula Al6B5O15(F,OH)3
Crystal System Hexagonal
Chemistry Classification Borate

Jeremejevite Colors

  • Colorless Jeremejevite Colorless

Countries of Origin

Namibia; Madagascar

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Tim Matthews

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Tim Matthews

Tim Matthews is President and Chief Executive Officer of Jewelry Television® (JTV), as well as a member of the company's Board of Directors. He oversees and leads all aspects of the company's powerful omni-digital retail platform that uniquely specializes in fine jewelry and gemstones. His passion for business and gemstones has led him to become a recognized expert in the field of gemology. He is a life member of the Gemmological Association of Great Britain (Gem-A) and has earned Gem-A's highest degrees, the Gemmology (FGA) and Diamond (DGA) diplomas. He is also a Graduate Gemologist (GG) of the Gemological Institute of America (GIA) and has also completed GIA's Graduate Diplomas in Diamonds, Colored Stones and Pearls. Under his leadership, JTV has become the leader in the sourcing and selling of color gemstones and jewelry.

This page was created on June 27, 2014.

This page was last edited on October 24, 2019.