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Glittering
Stones >> Semi
Precious Stones >> Labradorite
Semi Precious Stone Labradorite
Labradorite, feldspar mineral that act as an intermediate to
calcic member of the plagioclase series. Labradorite occurs as
white to gray and blocky to lath shaped grains in mafic igneous
rocks like basalt, gabbro and anorthosites. It is one of the attractive
gemstone with chemical formula of ((Ca,Na)(Al,Si)4O8).
It is defined as having "%An" (anorthite) between 50 and 70.
The specific gravity for the mineral ranges from 2.71 to 2.74
and the refractive index is 1.555 to 1.575. The gemstone varieties
of labradorite exhibits high degree of iridescence namely spectrolite,
moonstone, sunstone and high-quality samples with good iridescent
qualities are desired for jewelry.
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Historical Facts of Labradorite
| Refractive Index |
1.555 - 1.575 |
| Chemical Composition |
(Ca,Na)(Al,Si)4O8 |
| Hardness |
6 |
| Density |
2.71 - 2.74 |
| Crystal system |
Triclinic |
| Ocurrence |
Canada |
| Color |
Gray, White |
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Precious Stone Jewelry Labrodorite
| Labradorite Bracelet |
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| Labradorite Earring |
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| Labradorite Necklace |
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| Labradorite Rings |
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