Euclase 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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Euclase Gemstones by Size
This table shows distribution of Euclase 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:1.25 cts
Heaviest:2.28 cts
Average:1.67 cts
Total photos:3
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| General Information | |||||||||||||||||||||
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| Chemical Formula |
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| Euclase Treatments | |||||||||||||||||||||
| Blue and green may be produced by irradiation of colorless stones - Blue Chart Gem Identification, Herve Nicolas Lazzarelli, 2010, p 4 | |||||||||||||||||||||
| Physical Properties of Euclase | |||||||||||||||||||||
| Mohs Hardness | 7.5, Blue Chart Gem Identification (2010) More from other references | ||||||||||||||||||||
| Specific Gravity | 3.08 to 3.12, Blue Chart Gem Identification (2010) More from other references | ||||||||||||||||||||
| Cleavage Quality | Perfect, Blue Chart Gem Identification (2010) 1 perfect and easy cleavageMore from other references | ||||||||||||||||||||
| Optical Properties of Euclase | |||||||||||||||||||||
| Refractive Index | 1.650 to 1.677, Blue Chart Gem Identification (2010) More from other references | ||||||||||||||||||||
| Optical Character | Biaxial/+, Blue Chart Gem Identification (2010) More from other references | ||||||||||||||||||||
| Birefringence | 0.019 to 0.025, Blue Chart Gem Identification (2010) More from other references | ||||||||||||||||||||
| Pleochroism | Weak: colorless-(greenish) - yellow-green - blue-green, Blue Chart Gem Identification (2010) More from other references | ||||||||||||||||||||
| Dispersion | 0.016, Gemstones (2009) | ||||||||||||||||||||
| Colour | |||||||||||||||||||||
| Colour (General) | Colourless, greenish, bluish, greenish-blue, blue, Gemmological Tables (2004) More from other references | ||||||||||||||||||||
| Colour (Chelsea Filter) | Blue variety often shows red, Blue Chart Gem Identification (2010) | ||||||||||||||||||||
| Causes of Colour | Blue Fe2+-O-Fe3+ charge transfer. Green Cr3+ in octahedral coordination, Pragmatic Spectroscopy For Gemologists (2011) | ||||||||||||||||||||
| Transparency | Transparent, Gemmological Tables (2004) More from other references | ||||||||||||||||||||
| Lustre | Vitreous, Gemstones (2009) | ||||||||||||||||||||
| Crystallography of Euclase | |||||||||||||||||||||
| Crystal System | Monoclinic, Blue Chart Gem Identification (2010) More from other references | ||||||||||||||||||||
| Habit | Flattened prismatic, Gems, Sixth Edition (2006) More from other references | ||||||||||||||||||||
| Geological Environment | |||||||||||||||||||||
| Where found: | Euclase is found in pegmatites and is formed from the decomposition of beryl., Gems, Sixth Edition (2006) | ||||||||||||||||||||
| Further Information | |||||||||||||||||||||
| Mineral information: | Euclase information at mindat.org | ||||||||||||||||||||
| Significant Gem Localities | |||||||||||||||||||||
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