Phosphophyllite

Big Photo

Bolivia
0.39 carats
© Mineral Classics

The name Phosphophyllite reflects its phosphate content and Greek "phyllon" - a leaf, referring to its perfect leaf-like cleavage.

Phosphophyllite forms bluish- or sea-green thick tabular crystals, fish-tail twinning is common.

Phosphophyllite is highly valued by collectors for its delicate bluish green colour, but it is seldom cut because it is rare, fragile and brittle.

Phosphophyllite Gemstones by Colour

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

Phosphophyllite Gemstones by Size

This table shows distribution of Phosphophyllite 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:0.38 cts
Heaviest:1.57 cts
Average:0.78 cts
Total photos:3
Do you have a larger Phosphophyllite? Why not upload a photo?
0.38ct to 0.50ct0.50ct to 0.62ct0.62ct to 0.74ct0.74ct to 0.86ct0.86ct to 0.98ct0.98ct to 1.09ct1.09ct to 1.21ct1.21ct to 1.33ct1.33ct to 1.45ct1.45ct to 1.57ct
General Information
Chemical Formula
Zn
 
2
(Fe
2+
 
,Mn
2+
 
)(PO
 
4
)
 
2
· 4H
 
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 Phosphophyllite
Mohs Hardness3 to 3.5
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
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Specific Gravity3.07 to 3.13
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
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TenacityBrittle
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
Cleavage QualityPerfect
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
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FractureConchoidal
Arthur Thomas, Gemstones (2009)
Optical Properties of Phosphophyllite
Refractive Index1.595 to 1.621
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
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Optical CharacterBiaxial/-
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
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Birefringence0.021
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
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PleochroismNil
Arthur Thomas, Gemstones (2009)
DispersionVery weak
Arthur Thomas, Gemstones (2009)
Colour
Colour (General)Colourless, bluish-green, green
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
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Causes of ColourBluish green, Fe2+
W. William Hanneman, Pragmatic Spectroscopy For Gemologists (2011)
TransparencyTransparent
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
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LustreVitreous
Arthur Thomas, Gemstones (2009)
Fluorescence & other light emissions
Fluorescence (Short Wave UV)Violet
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
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Crystallography of Phosphophyllite
Crystal SystemMonoclinic
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
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HabitThick tabular crystals with numerous other forms, fish-tail and penetration twinning
Michael O’Donoghue, Gems, Sixth Edition (2006)
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Geological Environment
Where found:Occurs as a secondary mineral in zoned complex granite pegmatites or as an alteration product of sphalerite
Michael O’Donoghue, Gems, Sixth Edition (2006)
Further Information
Mineral information:Phosphophyllite information at mindat.org
Significant Gem Localities
Bolivia
 
  • Oruro Department
    • Dalence Province
      • Santa Fé Mining District
Gems, Sixth Edition, Michael O’Donoghue, 2006, p. 437
  • Potosí Department
    • Potosí City
Gems, Sixth Edition, Michael O’Donoghue, 2006, p. 437
    • Rafael Bustillo Province (Bustillos Province)
      • Llallagua
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