Jeremejevite

Jeremejevite is named after P.V. Jeremejev, Russian mineralogist and engineer, who first recognized the mineral.

Jeremejevite forms pale blue-green, cornflower-blue, brown or colourless transparent crystals, usually zoned in light hues.

Most gem material comes from Namibia. Jeremejevite produces attractive colourless, yellowish and blue faceted stones which rarely exceed 1 carat in weight.

Jeremejevite Gemstones by Colour

This table shows the variety of hues this gemstone can be found in. Click on a photo for more information.
 
 
 

Jeremejevite Gemstones by Size

This table shows distribution of Jeremejevite gemstone sizes that are listed on this site. This can give a good indication as to the general availability of this gemstone in different sizes.
Contributed photos
Lightest:0.14 cts
Heaviest:3.45 cts
Average:0.72 cts
Total photos:22
Do you have a larger Jeremejevite? Why not upload a photo?
0.14ct to 0.47ct0.47ct to 0.80ct0.80ct to 1.13ct1.13ct to 1.46ct1.46ct to 1.80ct1.80ct to 2.13ct2.13ct to 2.46ct2.46ct to 2.79ct2.79ct to 3.12ct3.12ct to 3.45ct
General Information
Chemical Formula
Al
 
6
B
 
5
O
 
15
(F,OH)
 
3
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
More from other references
Photos of natural/un-cut material from mindat.org
Physical Properties of Jeremejevite
Mohs Hardness6.5 to 7.5
Walter Schumann, Gemstones of the world (2001)
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Specific Gravity3.28 to 3.31
Walter Schumann, Gemstones of the world (2001)
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Cleavage QualityNone
Arthur Thomas, Gemstones (2009)
FractureConchoidal
Arthur Thomas, Gemstones (2009)
Optical Properties of Jeremejevite
Refractive Index1.638 to 1.650
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
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Optical CharacterUniaxial/-
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
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Birefringence0.007 to 0.009
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
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PleochroismDichroism: colorless - body color
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
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DispersionDistinct
Arthur Thomas, Gemstones (2009)
Colour
Colour (General)Colourless, yellow, blue, violet
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
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TransparencyTransparent
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
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LustreVitreous
Arthur Thomas, Gemstones (2009)
Fluorescence & other light emissions
Fluorescence (General)Inert
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
Crystallography of Jeremejevite
Crystal SystemHexagonal
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
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HabitHexagonal prisms, sometimes tapered with vicinal forms and with pyramidal terminations
Michael O’Donoghue, Gems, Sixth Edition (2006)
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Geological Environment
Where found:A rare late hydrothermal mineral formed in granite pegmatites
Michael O’Donoghue, Gems, Sixth Edition (2006)
Inclusions in Jeremejevite
Growth lines and zoning, "fingerprints" (partially healed fractures with fluid-filled channels) - Blue Chart Gem Identification, Herve Nicolas Lazzarelli, 2010, p 4
Further Information
Mineral information:Jeremejevite information at mindat.org
Significant Gem Localities
Myanmar
 
  • Mandalay Region
    • Pyin-Oo-Lwin District
        • Kyatpyin North
Ted Themelis (2008) Gems & mines of Mogok
Ted Themelis (2008) Gems & mines of Mogok
Ted Themelis (2008) Gems and Mines of Mogok
  • Sagaing Region
    • Katha District
      • Wuntho Township
Ted Themelis (2008) Gems & mines of Mogok
Namibia
 
  • Erongo Region
    • Arandis
      • Cape Cross area
Gems, Sixth Edition, Michael O’Donoghue, 2006, p. 420
Russia
 
  • Zabaykalsky Krai
    • Chitinskaya Oblast
      • Nerchinsk (Nertschinsk)
        • Nerchinsk Gem mines
          • Adun-Cholon Range
Gems, Sixth Edition, Michael O’Donoghue, 2006, p. 420
Tajikistan
 
  • Gorno-Badakhshan
    • Shughnon
      • Shakhdara Range
Copyright © Jolyon & Katya Ralph 1993-2019. Site Map. Locality, gem & photograph data are the copyright of the individuals who submitted them. For more information please contact the . Gemdat.org is an online information resource dedicated to providing free gemmological information to all.