onyx (ŏn`ĭks), variety of cryptocrystalline quartz quartz, one of the commonest of all rock-forming minerals and one of the most important constituents of the earth's crust. Chemically, it is silicon dioxide, SiO₂.
..... Click the link for more information. , differing from agate agate , translucent, cryptocrystalline variety of quartz and a subvariety of chalcedony. Agates are identical in chemical structure to jasper, flint, chert, petrified wood, and tiger's-eye, and are often found in association with opal.
..... Click the link for more information. only in that the bands of which it is composed are parallel and regular. Its appearance is most striking when the bands are of sharply contrasting colors; black and white specimens are often used for cameos. Onyx was used in Roman times for the fabrications of vases and cups. Sardonyx contains onyx and carnelian or sard. "Onyx marble," "Mexican onyx," and "Oriental alabaster" are terms applied to travertine travertine , form of massive calcium carbonate, CaCO₃, resulting from deposition by springs or rivers. It is often beautifully colored and banded as a result of the presence of iron compounds or other (e.g., organic) impurities.
..... Click the link for more information. .

onyx

Striped, semiprecious variety of the silica mineral agate with white and black alternating bands. Other varieties include carnelian onyx, with white and red bands, and sardonyx, with white and brown bands. Its properties are the same as those of quartz. Onyx is used in carved cameos and intaglios because its layers can be cut to show a colour contrast between the design and the background. It is found worldwide, but chiefly in India and South America.

Onyx

A family of graphics supercomputers from SGI that use the MIPS R10000 CPU and range from single-processor workstations to rack-mounted systems with 128 CPUs. They use SGI's InfiniteReality graphics subsystem which processes geometry, imaging and video data in real time.

onyx

1. a variety of chalcedony with alternating black and white parallel bands, used as a gemstone. Formula: SiO₂ - PLEASE CHECK FORMULA

2. a compact variety of calcite used as an ornamental stone; onyx marble. Formula: CaCO₃

onyx [′än·iks]

(mineralogy)

Banded chalcedonic quartz, in which the bands are straight and parallel; natural colors are usually red or brown with white, although black is occasionally encountered.

onyx marble

onyx

A banded, varicolored form of quartz, closely related to agate; cut into slabs, polished, and used for decorative building stone.

onyx

provokes disagreement and separates lovers. [Gem. Symbolism: Kunz, 98–99]

See : Discord

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No references found	Dirkovitch's dull green uniform was the only dark spot at the board, but his big onyx eyes made up for it. The Man Who Was by Kipling, Rudyard View in context	Ontario, Lake Onthophagus Ontic onto Ontogeny ontological argument Ontology Ontonagon County Ontsifor Lukinich Onufrievka Onuphidae ONVIF Onwasato Festival OnX onych-, onycho- onychia Onychodactylus Onychodontidae Onychomycosis Onychopalpida Onychophora onychophoran onychorrhexis Onychosis Onygenaceae Onyx onyx agate Onyx Marble onyx opal OO OOA OOAD OOBE Oocyst oocyte OOD OODB OODBMS OOF oogamete oogamous Oogamy Oogenesis OOGL Oogonium ookinete oolemma oolicast oolicastic porosity Oolite oolith	onychophoran Onychophorans Onychophorans Onychophorans onychoplasty Onychoprion fuscata onychoptosis onychorrhexis onychorrhexis onychoschisis onychoschizia onychosis onychosis onychosis onychotillomania onychotomy Onychphore Onychphore Onycomancy ONYD ONYEN Onygenaceae ONYI Onym Onym affix Onymancy onymous onymy Onyomi and kunyomi Onyomi and kunyomi Onyx onyx agate onyx marble onyx marble onyx opal onyxes onyxes onyxes onyxes Onyxia onyxis ONZ ONZ ONZE Onze Lieve Vrouw Hemelvaart Onze Lieve Vrouw Presentatie Onze Lieve Vrouwe Gasthuis Onze Lieve Vrouwe Instituut Onze Lieve Vrouwecollege Assebroek ONZM Oo Oo Oo OÖ OO (disambiguation) OO (disambiguation) oo- oo- OO-ALC Oo.o OO2C

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Dirkovitch's dull green uniform was the only dark spot at the board, but his big onyx eyes made up for it.

The Man Who Was by Kipling, Rudyard View in context

Onyx playV2('en/US/sy/syslsls5s5ht');playV2('en/UK/sy/syslsls5s5ht')

onyx

Onyx