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see jadejade,
common name for either of two minerals used as gems. The rarer variety of jade is jadeite, a sodium aluminum silicate, NaAl(SiO3)2, usually white or green in color; the green variety is the more valuable.
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a mineral belonging to the group of alkaline clinopyroxenes; a silicate of so-called chain structure. Its chemical composition is NaAl[Si2O6], and it contains slight admixtures of CaO, FeO, and MgO. It usually forms very dense, grainy, tough cryptocrystalline masses that range in color from white and bluish white to apple green. The coloring is often spotty. Jadeite is semitranslucent and very similar to nephrite. Its hardness on the mineralogical scale is 6.5–7.0, and its density is 3,300–3,400 kg/m3.

Jadeite is rare. It forms in alkaline metamorphic rocks and, less frequently, in contact-metamorphic complexes of rock associated with alkaline metasomatism. The largest known deposits are in Burma. In the USSR it is found in Kazakhstan and in the Pamirs. It is a valuable industrial stone, which has been used since ancient times for jewelry and artistic and decorative articles.


NaAl(SiO3)2 A clinopyroxene mineral occurring as green, fibrous monoclinic crystals; the most valuable variety of jade.
References in periodicals archive ?
Jadeite carved bangles continue to be in high demand and with definitive testing conducted by 888 Auction's very own JadeLab laboratories, buyers can feel confident in bidding on high quality 'A' Grade jadeite.
During the Neolithic period jadeite axes from northern Italy were deposited in significant numbers in the Morbihan in north-west France where some of them were reused as pendants, but their characteristic forms were closely copied in Galicia where there are a few examples made of the same raw material (Petrequin et al.
Section 3(a) bans the import of all goods of Burmese origin; Section 3A bans the import of jadeite and rubies extracted from Burma, and all goods containing Burmese jadeite and rubies.
However, the jadeite cabbage will be exhibited only at the Tokyo National Museum and the meat-shaped stone only at the Kyushu National Museum, each for two weeks.
This is quite understandable as fine quality examples, like the stone in the ring shown here, look very similar to the highly desirable translucent green jadeite known as Imperial green jade.
But when Michelle Obama wore Dickson Yewn's iconic jadeite and diamond Wish Fulfilling Lattice Ring during a 2011 state visit to Britain, the entire world noticed (far right, about $25,500).
Items the Tokyo National Museum has expressed interest in include the famous Jadeite Cabbage and Meat-shaped Stone of the Qing Dynasty (1644-1911) as well as calligraphic texts of Jin Dynasty calligrapher Wang Xizi (303-361).
Some examples are: "a ceremonial jadeite axe head from Aberdeenshire" "a 6000 year old bow .
While the United States will issue a waiver and general license to allow the import of most Burmese-made goods, restrictions on the import of jadeite and rubies mined or extracted from Myanmar will remain in place.
Among the most famous of the almost 700,000 artefacts is a carved Jadeite Chinese cabbage, complete with grasshopper.
Strangely enough, it's most popular exhibit is a small piece of jadeite carved into the shape of a cabbage.
His jadeite thumb-ring and large jadeite beads hint at affluence.