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chalcedony
chalcedony
chalcedony The group name for
cryptocrystalline varieties of silica composed of minute crystals of
quartz with submicroscopic pores and with composition ranging from SiO
2 to SiO
2.
nH
2O and including the
minerals agate,
chert,
opal,
onyx,
jasper, and flint; sp. gr. 2.50–2.67; habits variable from stalactitic to massive; commonly white, greyish-white, or grey, and occasionally yellow.
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Introducing sea blue chalcedony. (Gem Notes).(Brief Article)
Magazine article from: Jewelers Circular Keystone; 1/1/2002; ; 652 words
; Chalcedony is a natural microcrystalline quartz...and fire agate. Common translucent chalcedony occurs in a wide range of natural colors...discoveries made in blues and lavenders. With chalcedony's recent popularity--thanks to...
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Where's a good piece of chalcedony when you need one?(Gem Notes)(Brief Article)
Magazine article from: Jewelers Circular Keystone; 9/1/2004; ; 700+ words
; ...sardonyx, agate (banded chalcedony) bloodstone, sard...Matching inexpensive chalcedonies with beaders can result...artists have discovered chalcedony, too. They can get...and carvers can get chalcedony from almost anywhere in the world. Second, chalcedonies, including agates...
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Chalcedony: It's Back and Blue.(Brief Article)
Magazine article from: Jewelers Circular Keystone; 6/1/2001; ; 700+ words
; ...in our February issue that lavender chalcedony is fast becoming a hot commodity among...artists and jewelry designers ("Lavender Chalcedony: A New Find," JCK, February 2001...interest in an old favorite--blue chalcedony. "It's been around a lot longer...
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Maxam Magnata makes new chalcedonies for Tucson show.(www.wholesalegems.com)(Brief Article)
Magazine article from: Jewelers Circular Keystone; 2/1/2004; 693 words
; ...is launching two new colors of dyed chalcedony: Sunfire (golden yellow) and Verdana...green). Magnata released Sea Blue chalcedony last year in Tucson. Magnata is following...vogue. Because of its porous nature, chalcedony is often dyed. The most common dyed...
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Black chalcedony. (Jewel of the Month).(Brief Article)
Magazine article from: JCK's High-Volume Jeweler; 5/1/2002; ; 700+ words
; ...stone is chalcedony, a cryptocrystalline...Examples of chalcedonies of just one...rare. Most chalcedony is multicolored...multicolored chalcedonies include bloodstone...irregular, the chalcedony is called agate. Because chalcedonies are porous...
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Black chalcedony. (Jewel of the Month).(black onyx)(Brief Article)
Magazine article from: Jewelers Circular Keystone; 5/1/2002; ; 700+ words
; ...stone is chalcedony, a cryptocrystalline...Examples of chalcedonies of just one...rare. Most chalcedony is multicolored...multicolored chalcedonies include bloodstone...irregular, the chalcedony is called agate. Because chalcedonies are porous...
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US CHALCEDONY ALLIED WITH HUIJIE
News Wire article from: AsiaInfo Services; 8/23/1999; 237 words
; AsiaInfo Services 08-23-1999 US Chalcedony Allied with Huijie CHINA, August 23...It was announced on August 12 that US Chalcedony and Huijie Group had established a strategic...intelligence network products and solutions. Chalcedony is a world-famous network designer...
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Blue chalcedony.(jewel of the month)
Magazine article from: Jewelers Circular Keystone; 3/1/2005; ; 700+ words
; ...color types are sold as chalcedony, whereas the rest...as jasper or agate. Chalcedonies are nearly always cabbed...Namibia's blue chalcedony, often called "African...valuable of the "blue" chalcedonies, is a translucent purple-to-lavender chalcedony, that is, a blue...
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 "The Racing Post (London, England)")
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Fontwell: Chalcedony takes old pals honours.(Sports)
Newspaper article from: The Racing Post (London, England); 6/4/2002; 284 words
; Byline: George Ennor There was an ironic touch to the victory of Chalcedony over Mersey Beat in the novices' chase as the pair were stablemates at Gary Moore's yard until a short time ago. "Gary told...
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Lavender Chalcedony: A New Find.(from Gem Reflections of California)(Brief Article)
Magazine article from: Jewelers Circular Keystone; 2/1/2001; ; 682 words
; ...This time, it's lavender chalcedony. While chalcedonies, particularly agates, are...nice new find. The purplish chalcedony is found in an area that also...beauty. The new lavender chalcedony, a translucent material colored...
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chalcedony
Book article from: The Columbia Encyclopedia, Sixth Edition
chalcedony [from Chalcedon ], form of quartz the crystals...be seen except with the aid of a microscope. Chalcedony has a waxy luster and is translucent to transparent. The name chalcedony is applied more specifically to white, gray...
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geode
Book article from: The Columbia Encyclopedia, Sixth Edition
...mineral matter; they have a thin layer of chalcedony ( "wavy" quartz) covering an inner...will eventually be transformed into the chalcedony layer. As the water surrounding the...gel dehydrates, crystallizes to form chalcedony, and cracks, mineral-bearing water...
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quartz
Book article from: The Columbia Encyclopedia, Sixth Edition
...crystal structure of which can be seen only under the microscope, if at all, are chalcedony , flint , hornstone, and chert. Colored varieties of chalcedony known by special names are carnelian , sard, chrysoprase, agate , onyx , sardonyx...
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silica
Book article from: A Dictionary of Ecology
...quartz, tridymite, and cristobalite;(b)cryptocrystalline or very finely crystalline silica includes some chalcedony, chert, jasper, and flint; and(c)amorphous hydrated silica includes opal, diatomite, and some chalcedony.
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jasper
Book article from: The Oxford Dictionary of Phrase and Fable
jasper originally, any bright-coloured chalcedony other than carnelian; now, an opaque reddish-brown variety of chalcedony. In the Bible, jasper is the name of a stone in the high-priest's breastplate (Exodus 28:20); it is also...
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