Difference between revisions of "Rubellite"
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{{rubellite}} | {{rubellite}} | ||
[[Image:Rubelite_Tourmaline_-_Gem_Project.jpg|left|thumb|250px|Rubellite <br />Photo Courtesy of Precision Gem]]<br clear="left" /> | [[Image:Rubelite_Tourmaline_-_Gem_Project.jpg|left|thumb|250px|Rubellite <br />Photo Courtesy of Precision Gem]]<br clear="left" /> | ||
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+ | Rubellite is the pink to red color variety of [[tourmaline]]. The name can be applied to all species of the tourmaline group, but is generally elbaite. | ||
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+ | ==Treatments== | ||
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+ | Pink tourmaline is sometimes irradiated to enhance the color to a deeper red. |
Revision as of 06:22, 3 September 2007
Rubellite Tourmaline | |
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Chemical composition | Complex borosilicate |
Crystal system | Trigonal |
Habit | Prismatic |
Cleavage | None |
Fracture | Conchoidal |
Hardness | 7.5 |
Optic nature | Uniaxial - |
Refractive index | 1.62 - 1.64 |
Birefringence | 0.014 - 0.022 |
Dispersion | Low, 0.018 |
Specific gravity | 3.06 |
Lustre | Vitreous |
Pleochroism | Weak to strong |
Rubellite is the pink to red color variety of tourmaline. The name can be applied to all species of the tourmaline group, but is generally elbaite.
Treatments
Pink tourmaline is sometimes irradiated to enhance the color to a deeper red.