Padparadscha
Padparadscha Gemstones by Colour
This table shows the variety of hues this gemstone can be found in. Click on a photo for more information.
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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
| General Information | |||||||||||
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| A variety or type of: | Sapphire, which is a variety of Corundum | ||||||||||
| Chemical Formula |
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| Significant stones | |||||||||||
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| 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 Hardness | 9, Blue Chart Gem Identification (2010) | ||||||||||
| Specific Gravity | 3.95 to 4.10, Blue Chart Gem Identification (2010) | ||||||||||
| Optical Properties of Padparadscha | |||||||||||
| Refractive Index | 1.757 to 1.780, Blue Chart Gem Identification (2010) | ||||||||||
| Optical Character | Uniaxial/-, Gemmological Tables (2004) | ||||||||||
| Birefringence | 0.007 to 0.010, Gemmological Tables (2004) | ||||||||||
| Colour | |||||||||||
| Colour (General) | Pink-orange, Gemmological Tables (2004) | ||||||||||
| Causes of Colour | Orangy pink, Cr3+ in octahedral coordination and color centers, Cr4+ in octahedral coordination due to Cr4+ and Mg2+ substituting for Al3+ in the crystal structure., Pragmatic Spectroscopy For Gemologists (2011) | ||||||||||
| Transparency | Transparent,Translucent,Opaque, 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., Blue Chart Gem Identification (2010) | ||||||||||
| Crystallography of Padparadscha | |||||||||||
| Crystal System | Trigonal, Gemmological Tables (2004) | ||||||||||
| Further Information | |||||||||||
| Mineral information: | Padparadscha information at mindat.org | ||||||||||
| Significant Gem Localities | |||||||||||
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