jadeite

[′jā‚dīt]

(mineralogy)

NaAl(SiO₃)₂ A clinopyroxene mineral occurring as green, fibrous monoclinic crystals; the most valuable variety of jade.

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

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.

Mentioned in

References in periodicals archive

Jadeite, an aluminium silicate, is a different matter altogether.

Quality never becomes jaded; Jade is a symbol of perfection, beloved of emperors, but did you know there is more than one type - and not all of it is green?

(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.

ETHICAL REDUCTIONISM

Plaque showing a seated king and palace attendant, 600-800 AD, Maya, Mexico, Teotihuacan, jadeite, 14x 14cm.

The luxury of feathers: Joanne Pillsbury on artistic exchange in the Ancient Americas

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.

Literature of interest

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.

Martha maker

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.

Now could be time to cash in on ivory; Under the Hammer

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).

Argillization of topaz-bearing granites in the Hub stock, Horni Slavkov-Krasno Sn-W ore district (Bohemian Massif, Czech Republic)

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).

Structure of the Andean Palaeozoic basement in the Chilean coast at 31[degrees] 30' S: geodynamic evolution of a subduction margin

* Lot 120: An Emerald Green Jadeite 18k Gold Diamond Pendant (High Estimate: $2,500)

888 Auctions to Showcase Exceptional Pair of Chinese Gilt Gold Bronze Vases July 3

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.

Asteroid crash 290 mln years ago may have led Russian meteor on collision course with Earth

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.

10 things Taiwan does best