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.

Jade

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



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