Gaspéite

Big Photo

Australia
5.62 carats
© irocks.com

Gaspéite is named after its discovery locality, on the Gaspé Peninsula, Lemieux Township, Gaspé-ouest County, Quebec, Canada.

Gaspéite occurs in translucent bright grass-green to olive- or yellowish green nodular concretions or as aggregates of rhombic crystals.

Gaspéite is carved into sculptures and objects d'art. It is cut into cabochons and mounted in jewelry.

Gaspéite Gemstones by Colour

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

Gaspéite Gemstones by Size

This table shows distribution of Gaspéite 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:0.70 cts
Heaviest:7.03 cts
Average:2.85 cts
Total photos:9
Do you have a larger Gaspéite? Why not upload a photo?
0.70ct to 1.33ct1.33ct to 1.97ct1.97ct to 2.60ct2.60ct to 3.23ct3.23ct to 3.87ct3.87ct to 4.50ct4.50ct to 5.13ct5.13ct to 5.76ct5.76ct to 6.40ct6.40ct to 7.03ct
General Information
Chemical Formula
(Ni,MgFe)CO
 
3
Arthur Thomas, Gemstones (2009)
Photos of natural/un-cut material from mindat.org
Physical Properties of Gaspéite
Mohs Hardness4.5 to 5
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
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Specific Gravity3.21
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
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Cleavage QualityPerfect
Arthur Thomas, Gemstones (2009)
FractureUneven
Arthur Thomas, Gemstones (2009)
Optical Properties of Gaspéite
Refractive Index1.610 to 1.830
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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Birefringence0.220
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)Yellowish-green, green
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
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TransparencyTranslucent
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
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LustreVitreous
Arthur Thomas, Gemstones (2009)
Crystallography of Gaspéite
Crystal SystemTrigonal
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
More from other references
HabitNodular concretions or as aggregates of rhombic crystals
Michael O’Donoghue, Gems, Sixth Edition (2006)
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Geological Environment
Where found:Gaspéite is uncommon, occurring as a secondary mineral in a Ni-sulphide vein in metamorphosed siliceous dolostone
Michael O’Donoghue, Gems, Sixth Edition (2006)
Further Information
Mineral information:Gaspéite information at mindat.org
Significant Gem Localities
Canada
 
  • Québec
    • Gaspésie-Îles-de-la-Madeleine
      • La Haute-Gaspésie RCM
        • Mont-Albert
Gems, Sixth Edition, Michael O’Donoghue, 2006, p. 414
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