onyx

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Related to sardonyx: Chrysoprasus, birthstones

onyx

 [on´iks]
1. nail (def. 2).
2. a variety of hypopyon.

nail

(nāl),
1. One of the thin, horny, translucent plates covering the dorsal surface of the distal end of each terminal phalanx of fingers and toes. A nail consists of corpus or body, the visible part, and radix or root at the proximal end concealed under a fold of skin. The underpart of the nail is formed from the stratum germinativum of the epidermis, the free surface from the stratum lucidum, and the thin cuticular fold overlapping the lunula representing the stratum corneum. Synonym(s): unguis [TA], nail plate, onyx
2. A rod of metal or other solid substance, used in operations to fasten together the fragments of a broken bone.
[A.S. naegel]

nail

(nāl)
1. One of the thin, horny, translucent plates covering the dorsal surface of the distal end of each terminal phalanx of fingers and toes. A nail consists of a visible corpus or body, and a radix or root at the proximal end concealed under a fold of skin. The under part of the nail is formed from the stratum germinativum of the epidermis, and the free surface from the stratum lucidum, with the thin cuticular fold that overlaps the lunula representing the stratum corneum.
2. A slender rod of metal, bone, or other solid substance, used in operations to fasten together the divided extremities of a broken bone.
Synonym(s): unguis [TA] , nail plate, onyx.
References in periodicals archive ?
Shells are easier to carve than sardonyx and they were very popular with wealthy tourists since the cameo artists managed to achieve a tolerable likeness of the purchaser.
Sardonyx is from the onyx family, which in turn is a variety of chalcedony demonstrating straight layers of parallel, black and white pigments, which can prove very dramatic and ideal for cameos.
Being extremely porous, sardonyx is found in wonderfully warm, earthy colours with evenly spaced lines of sard in all shades of brown and, in some instances, a bright orange red.
A helicopter crew who rescued the Elhanan seamen were trying to save her last night, while the Sardonyx II and her five crew were heading back to port under her own power.
The museum was divided into several sections: (1) corals, (2) clays and earths, (3) crystal-lined geodes, amethyst, fluorite, diamond, opal, cat's-eye, emerald, topaz, malachite, jasper, beryl, sapphire, lapis lazuli, turquoise, ruby, garnet, chalcedony, sardonyx, carnelian, agate, magnetite, hematite, dolomite, gypsum and some fossils and other materials, (4) gold, silver, cinnabar, copper and iron minerals, antimony minerals, coal, talc, alum, cassiterite and others, (5) the herbarium, and (6) stuffed animals and dried or preserved animal parts, including the purported horn of a unicorn (actually a narwhal's tooth).
I have a waiting list for golden rings with prices in the six figures.' By contrast, 'The least mature markets are the Roman and the Circassian.' Georgiana Aitken at Christie's London confirms, 'Roman rings and intaglios come up all the time.' Most sell for between a few hundred pounds and the low thousands, but in December 2010 a particularly spectacular example, a Roman sardonyx cameo of Minerva from the 1st century AD, sold at Christie's New York for $60,000 (Fig.
A rare, 1st-century, tiny sardonyx vase formerly belonged to Princess Dashkova, a favourite of Catherine the Great.
The motto ring is excellent--in its way.' (20) He also acquired a sardonyx box inset with an antique cameo that came from the Arundel collection, for which he paid 21 guineas.
Unusually large, the three-layered sardonyx portrays the rulers of Egypt, Ptolemy Philadelphus n and his queen, Arsinoe II, at the time of their wedding in 278 BC.