Chrysoprase


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chrysoprase

[′kris·ə‚prāz]
(mineralogy)
An apple-green variety of chalcedony that contains nickel; used as a gem. Also known as green chalcedony.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Chrysoprase

 

a mineral; a green variety of chalcedony (see), with the color ranging from emerald green to grass and apple green, caused by microinclusions of nickel silicates. Chrysoprase has a vitreous or greasy luster. It is translucent and sometimes opalescent. In large segregations the degree of translucence and intensity of color varies. Chrysoprase occurs in the form of veins and veinlets in the weathering crust of ultrabasic rocks. Its formation is believed to be caused by hypergenic processes of chemical weathering of dunites and serpentinites or with the hydrothermal alteration of these rocks.

Chrysoprase is an attractive gem and semiprecious stone. It has been known and mined in Europe since the 14th century and was extensively used in the 17th and 18th centuries to make jewelry, church utensils, Florentine mosaics, and inlays. The largest deposit now being worked is at Marlborough in Australia; other deposits are found in Poland, the United States, and Brazil. In the USSR chrysoprase occurs in the Urals and in Kazakhstan.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

chrysoprase

put in mouth, renders bearer invisible. [Gem Symbolism: Kunz, 67–68]
Allusions—Cultural, Literary, Biblical, and Historical: A Thematic Dictionary. Copyright 2008 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
The high Ni content of this strongly coloured prase opal appears to be consistent with the notion that chrysoprase with a lower degree of crystallinity tends to have greater amounts of Ni and a more intense colour (cf.
Resisting the Romantic gesture, the poet describes the shards of glass by comparing them not only to gemstones like blue lapis and apple-green chrysoprase, but also to various shades of beer, boxed wine--even a creamy antacid.
His insects and birds were made out of moonstones and diamonds and today they seemed to us awesome in their magnificence as are his angelic faces which emerge mysteriously out of carved agate or green chrysoprase.
Perhaps the most beautiful varieties of quartz are chrysoprase and amethyst.
'amethyst and topaz, chrysoprase and jasper, a dozen jewels as in the foundations of the city of God' (p.
Brooch, 1908, designed by Josef Hoffmann, silver, partly gilt, agate, almandine, chrysoprase, carnelian, coral, lapis lazuli, moonstone, opal, turquoise.
You won't see any crystal structure in this green stone as it's a cryptocrystalline mineral with the slightly ungainly name of chrysoprase, cryptocrystalline referring to the microscopic nature of its crystals.
The collection consists of bracelets that are resplendent with diamonds, beautifully faceted Capri cut coloured stones such as amethyst or stunning rich colours of cabochon, chrysoprase and orange moonstones that are complemented by black sapphires or other precious stones in pave settings.
January - garnet or rose quarter February - amethyst or onyx March - aquamarine or bloodstone April - diamond or rock crystal May - emerald or chrysoprase June - alexadrite or moonstone or pearl July - ruby or carmelion August - peridot or sardonyx September - sapphire or lapis October - opal or tourmaline November - topaz or citrine December - zircon or turquoise
C'etait une emeraude carree, une emeraude-cabochon d'un vert assez pale, du vert laiteux de la chrysoprase ou semble luire et trembler un jus d'herbe.
3), to reveal its 'monsterpiece'--a gem-encrusted oval box made for Frederick the Great of Prussia in the 1760s and decorated with gold shepherds and shepherdesses set against a brilliant blue ground of chrysoprase. From the other vitrine, he produces a Faberge imperial snuffbox in salmon pink enamel, set with diamonds and inlaid with a miniature of Emperor Nicholas II (Fig.
chrysolites and beryls and chrysoprases and rubies ...