Ekanite
Sri Lanka
3.51 carats
© Rarestone.com
Ekanite occurs in poorly formed prismatic crystals of straw-yellow colour when pure, sometimes dark red or brown colour, which is caused by inclusions.
Radioactivity limits the use of Ekanite as a gemstone, all specimens should be stored with great care. Cut stones have weight up to 25 carats.
Ekanite 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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Ekanite Gemstones by Size
This table shows distribution of Ekanite 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:3.51 cts
Average:1.41 cts
Total photos:4
Do you have a larger Ekanite? Why not upload a photo?
| General Information | |||||||||||||||||
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| Chemical Formula |
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| Physical Properties of Ekanite | |||||||||||||||||
| Mohs Hardness | 6 to 6.5, Blue Chart Gem Identification (2010) More from other references | ||||||||||||||||
| Specific Gravity | 3.28 to 3.32, Blue Chart Gem Identification (2010) More from other references | ||||||||||||||||
| Cleavage Quality | Distinct, Gemstones (2009) | ||||||||||||||||
| Fracture | Uneven, Gemstones (2009) | ||||||||||||||||
| Optical Properties of Ekanite | |||||||||||||||||
| Refractive Index | 1.593 to 1.596, Blue Chart Gem Identification (2010) More from other references | ||||||||||||||||
| Optical Character | Uniaxial/-, Gemmological Tables (2004) More from other references | ||||||||||||||||
| Birefringence | 0.001, Gemmological Tables (2004) More from other references | ||||||||||||||||
| Chatoyancy | (Rare) star 4, Blue Chart Gem Identification (2010) | ||||||||||||||||
| Colour | |||||||||||||||||
| Colour (General) | Green, yellow-green, brownish, Gemmological Tables (2004) More from other references | ||||||||||||||||
| Transparency | Transparent,Translucent, Gemmological Tables (2004) More from other references | ||||||||||||||||
| Lustre | Vitreous, Gemstones of the world (2001) More from other references | ||||||||||||||||
| Crystallography of Ekanite | |||||||||||||||||
| Crystal System | Tetragonal, Gemstones of the world (2001) Originally tetragonal, later amorphous, due to persisting radioactivity.More from other references | ||||||||||||||||
| Habit | Poorly formed prismatic crystals, Gems, Sixth Edition (2006) More from other references | ||||||||||||||||
| Geological Environment | |||||||||||||||||
| Where found: | Skarn (?), placer deposits, Geology of gems (2003) | ||||||||||||||||
| Spectrographic Data | |||||||||||||||||
| Calculated Spectra: Click spectra for more information | Ekanite - Locality: Sri Lanka | ||||||||||||||||
| Inclusions in Ekanite | |||||||||||||||||
| Black thorite crystals with radiation halos - Blue Chart Gem Identification, Herve Nicolas Lazzarelli, 2010, p 5 | |||||||||||||||||
| Further Information | |||||||||||||||||
| Mineral information: | Ekanite information at mindat.org | ||||||||||||||||
| Significant Gem Localities | |||||||||||||||||
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