Wardite

Wardite is named after H.A. Ward, Professor of Natural Sciences, University of Rochester, New York, USA, mineral collector and dealer; founder of Ward's Natural Science Establishment.

Wardite forms transparent to translucent colourless to white, pale green or blue-green typically striated dipyramidal pseudo-octahedral crystals.

Wardite is cut into cabochons and rare crystals can make attractive gems.
General Information
Chemical Formula
NaAl
 
3
(PO
 
4
)
 
2
(OH)
 
4
· 2H
 
2
O
Michael O’Donoghue, Gems, Sixth Edition (2006)
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Photos of natural/un-cut material from mindat.org
Physical Properties of Wardite
Mohs Hardness4.5 to 5
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
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Specific Gravity2.81
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
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Cleavage QualityPerfect
Michael O’Donoghue, Gems, Sixth Edition (2006)
FractureConchoidal
Arthur Thomas, Gemstones (2009)
Optical Properties of Wardite
Refractive Index1.590 to 1.599
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
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Optical CharacterUniaxial/+
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
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Birefringence0.009
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
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Colour
Colour (General)Blue-green
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
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TransparencyTransparent,Translucent
Michael O’Donoghue, Gems, Sixth Edition (2006)
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LustreVitreous,Greasy
Arthur Thomas, Gemstones (2009)
Crystallography of Wardite
Crystal SystemTetragonal
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
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HabitDipyramidal pseudo-octahedral crystals
Michael O’Donoghue, Gems, Sixth Edition (2006)
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Geological Environment
Where found:Wardite occurs in complex-zoned pegmatites. Some wardite occurs with large
green variscite nodules.
Michael O’Donoghue, Gems, Sixth Edition (2006)
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Further Information
Mineral information:Wardite information at mindat.org
Significant Gem Localities
Brazil
 
  • Paraíba
    • Borborema mineral province
      • Pedra Lavrada
Gems, Sixth Edition, Michael O’Donoghue, 2006, p. 465
USA
 
  • Maine
    • Oxford Co.
      • Newry
Gems, Sixth Edition, Michael O’Donoghue, 2006, p. 465
  • Utah
    • Utah Co.
      • Oquirrh Mts
        • Fairfield
          • Clay Canyon
Gems, Sixth Edition, Michael O’Donoghue, 2006, p. 465
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