Lepidolite

Big Photo

Mexico
19.93 carats
© gemselect.com

Lepidolite is named after Greek "lepidos" - scale, alluding to the scaly appearance of many specimens.

Lepidolite is a violet to pink variety of Mica. Massive fine-grained material is used for ornamental purposes, it is polished into various shapes - cabochons and slabs. Transparent to translucent material is sometimes faceted.

Lepidolite Gemstones by Colour

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

Lepidolite Gemstones by Size

This table shows distribution of Lepidolite 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:19.93 cts
Heaviest:85.41 cts
Average:35.66 cts
Total photos:5
Do you have a larger Lepidolite? Why not upload a photo?
19.93ct to 26.48ct26.48ct to 33.03ct33.03ct to 39.57ct39.57ct to 46.12ct46.12ct to 52.67ct52.67ct to 59.22ct59.22ct to 65.77ct65.77ct to 72.31ct72.31ct to 78.86ct78.86ct to 85.41ct
General Information
Chemical Formula
KLi
 
2
Al(Al,Si)3O
 
10
(F,OH)
 
2
Arthur Thomas, Gemstones (2009)
Photos of natural/un-cut material from mindat.org
Physical Properties of Lepidolite
Mohs Hardness2.5
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
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Specific Gravity2.80 to 2.90
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
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Cleavage QualityPerfect
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
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FractureUneven
Arthur Thomas, Gemstones (2009)
Optical Properties of Lepidolite
Refractive Index1.525 to 1.587
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
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Optical CharacterBiaxial/-
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
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Birefringence0.018 to 0.038
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
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PleochroismNil
Arthur Thomas, Gemstones (2009)
DispersionNil
Arthur Thomas, Gemstones (2009)
Colour
Colour (General)Violet, pink, red
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
More from other references
Causes of ColourPink, Mn2+ in octahedral coordination Mn3+ in octahedral coordination
W. William Hanneman, Pragmatic Spectroscopy For Gemologists (2011)
TransparencyTransparent,Translucent
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
More from other references
LustreVitreous,Pearly
Arthur Thomas, Gemstones (2009)
Crystallography of Lepidolite
Crystal SystemMonoclinic
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
More from other references
HabitMassive
Michael O’Donoghue, Gems, Sixth Edition (2006)
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Geological Environment
Where found:The occurrence is chiefly, if not exclusively, in granite pegmatites
Michael O’Donoghue, Gems, Sixth Edition (2006)
Further Information
Mineral information:Lepidolite information at mindat.org
Significant Gem Localities
Afghanistan
 
  • Konar Province (Kunar Province; Konarh Province; Konarha Province; Nuristan)
    • Chapa Dara District
E.Ya. Kievlenko, Geology of gems, 2003, p. 110
  • Nuristan Province (Nurestan Province; Nooristan Province; Nuristan)
    • Du Ab District
      • Nilaw-Kolum pegmatite field
E.Ya. Kievlenko, Geology of gems, 2003, p. 110
Pakistan
 
  • Gilgit-Baltistan (Northern Areas)
    • Astor District (Astore District)
      • Astor valley (Astore valley)
E.Ya.Kievlenko, Geology of gems, 2003, p. 110
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