Linarite

Big Photo

Tuscany, Italy
21.90 carats
© Giovanni Scapin 2015

Linarite is named after its discovery locality at Linares, Jaén, Spain.

Linarite forms elongated and characteristically tabular transparent to translucent bright to dark blue crystals, which may appear deep blue in transmitted light.

Suitable for faceting material is rare.
General Information
Chemical Formula
PbCu(SO
 
4
)(OH)
 
2
Michael O’Donoghue, Gems, Sixth Edition (2006)
Photos of natural/un-cut material from mindat.org
Physical Properties of Linarite
Mohs Hardness2.5
Michael O’Donoghue, Gems, Sixth Edition (2006)
Specific Gravity5.35
Michael O’Donoghue, Gems, Sixth Edition (2006)
TenacityBrittle
Anthony et al, Handbook of mineralogy (2001)
Cleavage QualityPerfect
Michael O’Donoghue, Gems, Sixth Edition (2006)
FractureConchoidal
Anthony et al, Handbook of mineralogy (2001)
Optical Properties of Linarite
Refractive Index1.809 to 1.859
Michael O’Donoghue, Gems, Sixth Edition (2006) RI for the alpha, beta and gamma rays is 1.809, 1.838 and 1.859
Optical CharacterBiaxial/-
Michael O’Donoghue, Gems, Sixth Edition (2006)
Birefringence0.050
Michael O’Donoghue, Gems, Sixth Edition (2006)
PleochroismPale blue - blue - prussian blue
Anthony et al, Handbook of mineralogy (2001)
DispersionStrong
Anthony et al, Handbook of mineralogy (2001)
Colour
Colour (General)Bright to dark blue
Michael O’Donoghue, Gems, Sixth Edition (2006)
TransparencyTransparent,Translucent
Michael O’Donoghue, Gems, Sixth Edition (2006)
LustreSubadamantine,Vitreous
Anthony et al, Handbook of mineralogy (2001)
Crystallography of Linarite
Crystal SystemMonoclinic
Michael O’Donoghue, Gems, Sixth Edition (2006)
HabitElongated and characteristically tabular
Michael O’Donoghue, Gems, Sixth Edition (2006)
More from other references
Geological Environment
Where found:Occurs as an uncommon secondary mineral in the oxidized zone of lead–copper deposits
Michael O’Donoghue, Gems, Sixth Edition (2006)
Further Information
Mineral information:Linarite information at mindat.org
Significant Gem Localities
USA
 
  • Arizona
    • Graham Co.
      • Aravaipa Mining District
        • Santa Teresa Mts
          • Klondyke
            • Grand Reef Mountain
              • Laurel Canyon
mindat.org
    • Pinal Co.
      • Mammoth Mining District
        • Tiger
          • St. Anthony deposit
Gems, Sixth Edition, Michael O’Donoghue, 2006, p. 425
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.