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.


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

Gem Jewelry Jade

Jade Bracelet
Jade Bracelet
Jade Earrings
Jade Earring
Jade Necklace
Jade Necklace
Jade Rings
Jade Rings