Strontianite

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Austria
2.86 carats
© Rarestone.com

Strontianite is named after its discovery locality, at Strontian, Argyllshire, Scotland. The element strontium was discovered in this mineral by Cruikshank in 1790.

Strontianite forms pale grey or pale green, sometimes pale red, brown or colourless, typically short to long prismatic crystals.

Fine crystals are small and are occasionally faceted.

Strontianite Gemstones by Colour

This table shows the variety of hues this gemstone can be found in. Click on a photo for more information.
 
General Information
Chemical Formula
SrCO
 
3
Walter Schumann, Gemstones of the world (2001)
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Photos of natural/un-cut material from mindat.org
Physical Properties of Strontianite
Mohs Hardness3.5
Walter Schumann, Gemstones of the world (2001)
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Specific Gravity3.63 to 3.79
Walter Schumann, Gemstones of the world (2001)
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TenacityBrittle
Anthony et al, Handbook of mineralogy (2001)
Cleavage QualityPerfect
Michael O’Donoghue, Gems, Sixth Edition (2006) Nearly perfect
FractureUneven,Sub-Conchoidal
Anthony et al, Handbook of mineralogy (2001)
Optical Properties of Strontianite
Refractive Index1.517 to 1.667
Anthony et al, Handbook of mineralogy (2001)
Optical CharacterBiaxial/-
Anthony et al, Handbook of mineralogy (2001)
DispersionWeak
Anthony et al, Handbook of mineralogy (2001)
Colour
Colour (General)Light yellow, colourless, white, brown, green, reddish.
Walter Schumann, Gemstones of the world (2001)
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TransparencyTransparent,Translucent
Walter Schumann, Gemstones of the world (2001)
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LustreVitreous,Greasy
Walter Schumann, Gemstones of the world (2001) On surface of fracture greasy lustre.More from other references
Fluorescence & other light emissions
Fluorescence (General)Fluorescent under UV
Anthony et al, Handbook of mineralogy (2001)
ThermoluminescenceMay be thermoluminescent
Anthony et al, Handbook of mineralogy (2001)
Crystallography of Strontianite
Crystal SystemOrthorhombic
Walter Schumann, Gemstones of the world (2001)
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HabitShort to long prismatic crystals
Michael O’Donoghue, Gems, Sixth Edition (2006)
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Geological Environment
Where found:Strontianite is an uncommon low-temperature hydrothermal mineral formed in veins in limestone.
Michael O’Donoghue, Gems, Sixth Edition (2006)
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Further Information
Mineral information:Strontianite information at mindat.org
Significant Gem Localities
Germany
 
  • North Rhine-Westphalia
    • Münster
      • Ahlen
        • Langst
Lapis 1983(7/8), 48-50
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