chalcedony

• “There is a kind of onyx called a chalcedony, which hath the same qualities, [4151] avails much against fantastic illusions which proceed from melancholy, preserves the vigour and good estate of the whole body.”

  Anatomy of Melancholy

• “As to the second, of which the name does not occur in treatises on gems, it may be identified with chalcedony, which is described as a sort of agate of an opaque quality, dimmed with clouds and flashing fires in the shadows.”

  The Cathedral

• “Of the seven necklaces pictured here, all purchased recently, three are varieties of chalcedony, which is itself a type of microcrystalline quartz.”

  WalesOnline - Home

• “They were often made of semiprecious stones such as chalcedony, rock crystal, and lapis lazuli.”

  Jeweler's Wheel Secrets

• “The many semi-precious stones which have a quartz basis (such as the varieties of waxy or cryptocrystalline chalcedony which is largely quartz in a very minutely crystalline condition) are often even tougher than the clear crystallized quartz.”

  A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public

• “The smooth edge of the circular disc is then charged with diamond dust and oil, the diamond dust being bedded into the edge of the metal disc by the pressure of some hard, fine-grained material, such as chalcedony, or rolled into the metal by the use of a rotating roller.”

  A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public

• “It was one of the stones on the breastplate of the high priest (Ex. 28: 20; R.V. marg., "chalcedony;" 39: 13).”

  Easton's Bible Dictionary

• “Or, again, if we borrow from Pope Innocent III. his ideas as to the mystical meanings of gems, we find that chalcedony, which is pale in the light and sparkles in the dark, is synonymous with humility; the topaz with chastity and the merit of good works, while the chrysoprase, the queen of minerals, implies wisdom and watchfulness.”

  The Cathedral

• “Top lot will be the cover of a chalcedony cup dating from the 16th century, featuring Venus and Cupid cradled together within a scallop shell and framed by a silver gilt mount in the form of Jupiter as a swan.”

  The Wall Street Journal: A Week of Masters Descends

• “From top: Siegelson antique archaeological revival gold and chalcedony brooch by Castellani, ca. 1880, price upon request, Siegelson, 212-832-2666; Bottega Veneta Milk silver bracelet $790 left and Magma silver bracelet $1,290 Bottegaveneta.com ; Stephen Russell Victorian 18k yellow gold agate pearl ruby and hard stone brooch, ca.”

  The Wall Street Journal: Cue the Cameo

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