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Onyx: Typically black-and-white-banded or monochromatic agate: Semi-translucent to opaque Cryptocrystalline Jasper: Impure chalcedony or chert, typically red to brown but the name is often used for other colors: Opaque Cryptocrystalline or Microcrystalline Milky quartz: White, may display diasterism: Translucent to opaque Macrocrystalline Smoky ...
Black Onyx Onyx. Onyx - Hebrew שֹׁהַם shoham, Greek ὀνύχινος onychinos, Latin lapis onychinus. The eleventh stone of the breastplate in the Hebrew and the Vulgate (Exodus 28:20, 39:13), representing the tribe of Joseph. In the Septuagint it is the twelfth stone and the fifth in Ezekiel 28:13 in the Hebrew, but the twelfth ...
Onycha is a play on the word onyx which was a gem. The onyx most esteemed by the ancients was the black gem. [30] The Hebrew word for onyx was shoham and “Braun traces shoham to the Arabic sachma,'blackness:' 'Of such a color,' says he, 'are the Arabian [onyxes], which have a black ground-color.'
Calcite. Manganoan calcite (var.); Caledonite; Canasite; Cancrinite. Vishnevite; Carletonite; Carnallite; Cassiterite; Catapleiite; Cavansite; Celestite; Ceruleite ...
An opal doublet consists of a relatively thin layer of precious opal, backed by a layer of dark-colored material, most commonly ironstone, dark or black common opal (potch), onyx, or obsidian. The darker backing emphasizes the play of color and results in a more attractive display than a lighter potch.
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Other members of the cryptocrystalline silica family include agate, carnelian, and onyx. Unlike many non-transparent silica minerals, it is the color of chrysoprase, rather than any pattern of markings, that makes it desirable. The word chrysoprase comes from the Greek χρυσός chrysos meaning 'gold' and πράσινον prasinon, meaning ...
A modern hand-carved portrait cameo of white on blue-layered agate, set in 18 kt white gold. Many modern cameos are carved into layered agates. The layers are dyed to create strong color contrasts. The most usual colors used for two-layer stones are white on black, white on blue, and white on red-brown. Three-layer stones are sometimes made.