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Glittering
Stones >> Semi
Precious Stones >> Jade
Semi Precious Stone Jade
An ornamental stone, jade is a name which is
applied to two different silicate minerals. Nephrite is a form
of the amphibole actinolite (a mineral that also includes a form
of asbestos). The second, the mineral jadeite, is the pyroxene.
Nephrite has the formula Ca2 (Mg, Fe) 5Si8O22 (OH) 2. Jadeite
has a formula NaAlSi2O6. The two are quite similar in appearance
and normally it wasn't until 1863 that the two forms of this gemstone
were distinguished.
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Historical Facts of Jade
| Refractive Index |
1.654 - 1.667 |
| Chemical Composition |
NaAl(SiO3)2 |
| Hardness |
7 |
| Density |
3.32 |
| Crystal Group |
Monoclinic |
| Varieties |
Jadeite, Nephrite |
| Color |
Pure white thru pink, brown, red, orange, yellow,
mauve, violet, blue, black, green, mottled green and
white |
| Ocurrence |
Northern Myanmar, China, Russia, Niigata, Japan; San
Benito County, California, USA, and Guatemala |
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Gem Jewelry Jade
| Jade Bracelet |
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| Jade Earrings |
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| Jade Necklace |
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| Jade Rings |
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