Riesling Beryl
A strongly dichroic variety of Beryl, originally found in eastern Germany in 1840, it is named after the Riesling grape as it has a similar pale green colour.
| General Information | ||||||||||||||||||
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| A variety or type of: | Beryl | |||||||||||||||||
| Chemical Formula |
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| Physical Properties of Riesling Beryl | ||||||||||||||||||
| Mohs Hardness | 7.5 to 8, Gemstones of the world (2001) | |||||||||||||||||
| Specific Gravity | 2.66 to 2.86, Riesling Beryl (2009) | |||||||||||||||||
| Tenacity | Brittle, Gemstones of the world (2001) | |||||||||||||||||
| Cleavage Quality | Indistinct, Gemstones of the world (2001) | |||||||||||||||||
| Fracture | Conchoidal, Gemstones of the world (2001) | |||||||||||||||||
| Optical Properties of Riesling Beryl | ||||||||||||||||||
| Refractive Index | 1.59, Riesling Beryl (2009) | |||||||||||||||||
| Birefringence | 0.004 to 0.010, Gemstones of the world (2001) | |||||||||||||||||
| Pleochroism | Strongly dichroic, Riesling Beryl (2009) | |||||||||||||||||
| Dispersion | 0.014, Gemstones of the world (2001) | |||||||||||||||||
| Colour | ||||||||||||||||||
| Colour (General) | Pale green colour, with a warm golden yellow flash., Riesling Beryl (2009) | |||||||||||||||||
| Crystallography of Riesling Beryl | ||||||||||||||||||
| Crystal System | Hexagonal, Riesling Beryl (2009) | |||||||||||||||||
| Habit | Hexagonal prisms, Gemstones of the world (2001) | |||||||||||||||||
| Further Information | ||||||||||||||||||
| Mineral information: | Riesling Beryl information at mindat.org | |||||||||||||||||