Glittering Stones >> Semi
Precious Stones >> Turquoise
Semi Precious Stone Turquoise
Turquoise is a beautiful blue opaque semi-precious
gemstone. The highest grades are "robin's egg blue,"
and the color of the blue sky. Inferior grades are greenish. Turquoise
that fades in color is also inferior. Turquoise is a phosphate of aluminum
with small quantities of copper and also iron. The gem is slightly harder
than glass.
Ancient and yet always at the height of the current fashion: that is
Turquoise for you. Its brilliant sky-blue belongs to the all-time favorite
trend colour in the world of fashion and jewellery.
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Historical Facts of turquoise
| Refractive index |
1.61 - 1.65 |
| Chemical Composition |
CuAl6(PO4)4(OH)8·4H2O |
| Crystal system |
Triclinic |
| Mohs Scale hardness |
5 - 6 |
| Luster |
Waxy to subvitreous |
| Specific gravity |
2.6 - 2.9 |
| Color |
Blue, blue-green, green |
| Ocurrence |
Afghanistan, Australia, northern Chile, Cornwall, Saxony, Silesia, Turkestan, India, Tibet |
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Gem Stone Turquoise Jewelry
Turquoise Bracelet  |
Turquoise Earring  |
Turquoise Necklace  |
Turquoise Ring  |
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