Augelite

Augelite is named after Greek "auge" - bright, alluding to the pearly lustre of cleavage surfaces.

Augelite is an extremely rare phosphate mineral found at a very few localities worldwide. Colourless, yellowish, pale rose or pale blue crystals of augelite have been fashioned.

White Mountain, California appeared to be the only source of facet-grade rough, but it has been reported to be exhausted.

Augelite Gemstones by Colour

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

Augelite Gemstones by Size

This table shows distribution of Augelite 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:0.56 cts
Heaviest:1.77 cts
Average:1.21 cts
Total photos:3
Do you have a larger Augelite? Why not upload a photo?
0.56ct to 0.68ct0.68ct to 0.80ct0.80ct to 0.92ct0.92ct to 1.04ct1.04ct to 1.17ct1.17ct to 1.29ct1.29ct to 1.41ct1.41ct to 1.53ct1.53ct to 1.65ct1.65ct to 1.77ct
General Information
Chemical Formula
Al
 
2
(PO
 
4
)(OH)
 
3
Michael O’Donoghue, Gems, Sixth Edition (2006)
Photos of natural/un-cut material from mindat.org
Physical Properties of Augelite
Mohs Hardness4.5 to 5
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
More from other references
Specific Gravity2.70 to 2.75
Walter Schumann, Gemstones of the world (2001)
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TenacityBrittle
Arthur Thomas, Gemstones (2009) Very brittle
Cleavage QualityPerfect
Arthur Thomas, Gemstones (2009)
FractureConchoidal
Arthur Thomas, Gemstones (2009)
Heat SensitivitySensitive
Arthur Thomas, Gemstones (2009)
Optical Properties of Augelite
Refractive Index1.570 to 1.591
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
More from other references
Optical CharacterBiaxial/+
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
More from other references
Birefringence0.020 to 0.021
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
More from other references
PleochroismNil
Arthur Thomas, Gemstones (2009)
DispersionNil
Arthur Thomas, Gemstones (2009)
Colour
Colour (General)Colourless, yellowish
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
More from other references
TransparencyTransparent
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
More from other references
LustreVitreous
Michael O’Donoghue, Gems, Sixth Edition (2006)
More from other references
Fluorescence & other light emissions
Fluorescence (General)Shows no luminescence
Michael O’Donoghue, Gems, Sixth Edition (2006)
Crystallography of Augelite
Crystal SystemMonoclinic
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
More from other references
HabitTabular
Michael O’Donoghue, Gems, Sixth Edition (2006)
More from other references
Geological Environment
Where found:Occurs in granitic pegmatites and hydrothermal veins.
Arthur Thomas, Gemstones (2009)
Further Information
Mineral information:Augelite information at mindat.org
Significant Gem Localities
Canada
 
  • Yukon
    • Dawson mining district
mindat.org
Peru
 
  • La Libertad
    • Sanchez Carrion Province
      • Huamachuco
        • Mundo Nuevo
          • Mundo Nuevo Mine
USA
 
  • California
    • Mono Co.
      • White Mts
        • White Mountain Peak
Gems, Sixth Edition, Michael O’Donoghue, 2006, p.385
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