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onyx

onyx (ŏn´Ĭks), variety of cryptocrystalline quartz, differing from agate 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.

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Onyx

Onyx

A precious stone whose properties were believed to resemble those of jasper; it was also supposed to increase saliva in boys and cause bad dreams. If applied to the eye, it was believed to remove anything noxious.

The onyx was also believed to create strife, cause melancholy, and cure epilepsy. According to the Bible, an onyx was the eleventh stone in the breastplate of the High Priest (Exod. 28:20), but it is possible that this stone (in Hebrew, shoham ) is known today as beryl.

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onyx

onyx a semi-precious variety of agate with different colours in layers. In the Bible it is one of the precious jewels said in Exodus 28:20 to have been set in the high priest's breastplate, and in Revelation 21:20 it is said to be one of the twelve jewels set in the wall of the New Jerusalem.

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onyx

onyx Semi-precious variety of the mineral chalcedony, a form of agate. It has straight parallel bands. White and red forms are called carnelian onyx; white and brown, sardonyx. It is found mostly in India and South America.

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onyx

onyx (sardonyx) A mixture of chalcedonic (see CHALCEDONY) silica SiO2 and hydrous silica SiO2.nH2O; occurs as flat, banded varieties with white, grey, brown, red, and black bands.

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onyx

onyx XIII (oniche). — OF. oniche, onix — L. acc. onycha, nom. onyx — Gr. ónukha, ónux NAIL, claw, onyx stone.

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onyx

on·yx / ˈäniks/ • n. a semiprecious variety of agate with different colors in layers.

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onyx

onyxadmix, affix, commix, fix, Hicks, intermix, MI6, mix, nix, Nyx, pix, Pnyx, prix fixe, pyx, Ricks, six, Styx, transfix, Wicks •Aquarobics • radix • appendix •crucifix • suffix • Alex • calyx •Felix, helix •kylix • Horlicks • prolix • spondulicks •hydromechanics • phoenix •Ebonics, onyx •mechatronics • sardonyx •Paralympics • semi-tropics •subtropics • Hendrix •dominatrix, matrix •administratrix • oryx • tortrix •executrix • Beatrix • cicatrix •Essex, Wessex •kinesics • coccyx • Sussex •informatics, mathematics •Dianetics • geopolitics • bioethics •cervix • astrophysics • yikes

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