Pargasite

Big Photo

Ethiopia
4.71 carats
© Rarestone.com

Pargasite is named after its discovery locality, at Pargas, 10 km south of Turku, Finland.

Pargasite forms transparent to translucent bluish green or chrome (emerald)-green to light brown stout prismatic crystals.

Fine crystals have been faceted.

Pargasite Gemstones by Colour

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

Pargasite Gemstones by Size

This table shows distribution of Pargasite 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:1.07 cts
Heaviest:4.71 cts
Average:3.30 cts
Total photos:4
Do you have a larger Pargasite? Why not upload a photo?
1.07ct to 1.43ct1.43ct to 1.80ct1.80ct to 2.16ct2.16ct to 2.53ct2.53ct to 2.89ct2.89ct to 3.25ct3.25ct to 3.62ct3.62ct to 3.98ct3.98ct to 4.35ct4.35ct to 4.71ct
General Information
Chemical Formula
NaCa
 
2
(Mg
 
4
Al)Si
 
6
Al
 
2
O
 
22
(OH)
 
2
Michael O’Donoghue, Gems, Sixth Edition (2006)
Photos of natural/un-cut material from mindat.org
Physical Properties of Pargasite
Mohs Hardness5 to 6
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
More from other references
Specific Gravity3.04 to 3.26
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
More from other references
TenacityBrittle
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
Cleavage QualityPerfect
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
More from other references
Optical Properties of Pargasite
Refractive Index1.613 to 1.663
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
More from other references
Optical CharacterBiaxial/+
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
More from other references
Birefringence0.020 to 0.024
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
More from other references
PleochroismOrange/brown stones - distinct: colorless to yellow - light brown - brown; Green stones - distinct: greenish-yellow - emerald-green - greenish-blue
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
More from other references
Colour
Colour (General)Bluish green or chrome (emerald)-green to light brown
Michael O’Donoghue, Gems, Sixth Edition (2006)
Causes of ColourGreen to brown, Fe2+ in various sites
W. William Hanneman, Pragmatic Spectroscopy For Gemologists (2011)
TransparencyTransparent,Translucent
Michael O’Donoghue, Gems, Sixth Edition (2006)
Crystallography of Pargasite
Crystal SystemMonoclinic
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
More from other references
HabitStout prismatic crystals
Michael O’Donoghue, Gems, Sixth Edition (2006)
Geological Environment
Where found:Pargasite occurs in igneous and metamorphic rocks
Michael O’Donoghue, Gems, Sixth Edition (2006)
Further Information
Mineral information:Pargasite information at mindat.org
Significant Gem Localities
Burma (Myanmar)
 
  • Mandalay Division
    • Pyin-Oo-Lwin District
      • Mogok Township
        • Mogok Valley
Ted Themelis (2008) Gems & mines of Mogok
Ted Themelis (2008) Gems & mines of Mogok
        • Pein-Pyit (Painpyit; Pyan Pyit)
Ted Themelis (2008) Gems & mines of Mogok
Vietnam
 
  • Yenbai Province (Yen Bai Province)
Hauzenberger, Ch.A., Walter, F., Hofmeister, W., Phan Tien, D. & Kienzl, N. (2005): Mineralogical, petrological and crystallographic investigations of two amphiboles from ruby and spinel bearing marbles, Luc Yen, Province Yen Bai, Vietnam. In: Hofmeister, W. et al. (ed): Proceedings of the third international workschop on gem-materials and modern analytical methods. Hanoi, Vietnam. 3-8; http://www.mindat.org/mesg-7-69925.html
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