jadeite


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jadeite:

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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Jadeite

 

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.

jadeite

[′jā‚dīt]
(mineralogy)
NaAl(SiO3)2 A clinopyroxene mineral occurring as green, fibrous monoclinic crystals; the most valuable variety of jade.
References in periodicals archive ?
(20) For ease of exposition, most of this article assumes an abundant view of properties on which there is a (nonscientific) property of being jade, since there are (scientific) properties of being jadeite and being nephrite.
Plaque showing a seated king and palace attendant, 600-800 AD, Maya, Mexico, Teotihuacan, jadeite, 14x 14cm.
Graining in pink diamond * Yellow HPHT-treated rough diamond * Color-zoned emerald * Orange faceted eosphorite * Large faceted hibonite * Dyed and natural green jadeite * Coated kornerupine beads * Assembled cultured blister pearl * Large abalone pearls * Irradiated green-blue CVD synthetic diamonds * Polished topaz imitating diamond rough.
The downloadable designs (including coasters, napkin rings and votive holders) and plastic PLA filament (in colors like Jadeite, Robin's Egg and Lemon Drop) were inspired by the "milk glass" of the late 19th century.
En janvier 2012, le Centre de protection de la sante de Hong Kong organisa un exercice appele Jadeite simulant l'evacuation d'un batiment oo une personne etait supposement infectee par le virus H5N1.
This Chinese carved jadeite antique buckle in the form of a stylised dragon was bought at auction in London in the 1960s and had been on display in a cabinet in a Wirral home ever since.
Standards included diopside (Ca, Mg), fluorite (F), jadeite (Na, Al), leucite (K), magnetite (Fe), quartz (Si), RbCl (Rb), rhodonite (Mn), rutile (Ti), spinel (Cr) and tugtupite (Cl).
The growth of Ab porphyroblasts could result from destabilisation of jadeite through reactions such as Jd + Qz = Ab, or paragonite, present in some rocks of ChMC (Willner et al., 2012).
* Lot 120: An Emerald Green Jadeite 18k Gold Diamond Pendant (High Estimate: $2,500)
Lead researcher Shin Ozawa, of Japan's University of Tohoku, and his team discovered a mineral called jadeite in glass-like veins inside the samples of the Russia meteor which could only be produced under massive pressure and heat, like an impact with another asteroid.
Chinese history is told through bronze statues, jade carvings, calligraphy, lacquerware and other historical pieces--many of which belonged to Chinese imperial families--including an intriguingly life-like, meat-shaped stone and a jadeite cabbage.