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n. A chalcedony that occurs in bands of different colors and is used as a gemstone, especially in cameos and intaglios.

n. A banded variety of chalcedony, a cryptocrystalline form of quartz.

adj. jet-black

n. Chalcedony in parallel layers of different shades of color. It is used for making cameos, the figure being cut in one layer with the next as a ground.

n. Same as Mexican onyx.

n. A deep jet-black color.

adj. Deep, jet-black.

n. A variety of quartz, closely allied to agate, characterized by a structure in parallel bands differing in color or in degree of translucency: in the better kinds the layers are sharply defined and the colors white with black, brown, or red.

n. An infiltration of pus between he layers of the cornea, resembling a nail.

n. In conchology: The piddock, Pholas dactylus.

n. A razor-shell; a bivalve of the family Solenidæ.

n. a chalcedony with alternating black and white bands; used in making cameos

"The high altar, composed of Mexican marble and onyx, is one of the finest ever constructed."

mexican onyx   

chalcedony    calcedony   

onyx marble    oriental onyx    sardonyx   

sardonyx   

avionics    conics    electronics    harmonics    histrionics    microelectronics    mnemonics    nucleonics    phonics    sonics   

jasper    amethyst    carnelian    chalcedony    jade    agate    alabaster    sardonyx    opal    obsidian