Padparadscha

Big Photo

Sri Lanka
3.11 carats
© Palagems

Padparadscha is a salmon-pink variety of Corundum, originally being mined in Sri Lanka, but also found in Vietnam and some parts of Africa.

The name is derived from the Sanskrit/Sinhalese "padma raga", the word for the colour of local lotus flower.

Padparadscha Gemstones by Colour

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

Padparadscha Gemstones by Size

This table shows distribution of Padparadscha 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:1.04 cts
Heaviest:3.11 cts
Average:1.71 cts
Total photos:5
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Significant stones
Unnamed Padparadschah47 cts
1.04ct to 1.25ct1.25ct to 1.45ct1.45ct to 1.66ct1.66ct to 1.87ct1.87ct to 2.08ct2.08ct to 2.28ct2.28ct to 2.49ct2.49ct to 2.70ct2.70ct to 2.90ct2.90ct to 3.11ct
General Information
A variety or type of:Sapphire, which is a variety of Corundum
Chemical Formula
Al
 
2
O
 
3
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
Significant stones
ImageNameWeightCountry of OriginCurrent Owner
Unnamed Padparadschah47.00 ctsSri Lanka
Padparadscha Treatments
Routinely produced by beryllium diffusion: usually shows a yellow-orangy rim - pink core when immersed. Once produced by irradiation of pink sapphire: colour fading permanently if heated - Blue Chart Gem Identification, Herve Nicolas Lazzarelli, 2010, p.2

Radioactive bombardment is used much less often for strengthening the yellow colour of sapphire and the creation of an orange tint in pink chromium-rich stones, which is characteristic for padparadscha sapphires. The colour acquired in this way is unstable and soon fades in sunlight (Schmetzer and Boschart, 1983; Robert, 1988)
Physical Properties of Padparadscha
Mohs Hardness9
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
Specific Gravity3.95 to 4.10
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
Optical Properties of Padparadscha
Refractive Index1.757 to 1.780
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
Optical CharacterUniaxial/-
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
Birefringence0.007 to 0.010
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
Colour
Colour (General)Pink-orange
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
Causes of ColourOrangy pink, Cr3+ in octahedral coordination and color centers, Cr4+ in octahedral coordination due to Cr4+ and Mg2+ substituting for Al3+ in the crystal structure.
W. William Hanneman, Pragmatic Spectroscopy For Gemologists (2011)
TransparencyTransparent,Translucent,Opaque
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
Fluorescence & other light emissions
Fluorescence (Long-Wave UV)If present, a homogeneous orange fluorescence with indication of high heat-treatment suggest a beryllium diffusion treatment.
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
Crystallography of Padparadscha
Crystal SystemTrigonal
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
Further Information
Mineral information:Padparadscha information at mindat.org
Significant Gem Localities
Sri Lanka
 
  • Sabaragamuwa Province
    • Ratnapura District
Gemexplorer.org
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