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• Turquoise
  ...Mexico). Turquoise can be blue, greenish blue or green with inclusions of red sandstone. Turquoise is used for cabochon jewelry, inlays, beads and small
  3 KB (412 words) - 16:04, 17 December 2022
• Massicot
  ...e than massicot due to the presence of small amounts of [[lead%20tetroxide|red lead oxide]]. Lead monoxide has been used as a drier in oil and as a low-fi
  3 KB (504 words) - 13:55, 17 October 2022
• Olivine
  ..., called [[peridot|peridot]], come from Zabargad (St. John's Island in the Red Sea) and from Minas Gerais (Brazil), South Africa, Myanmar (formerly Burma)
  3 KB (442 words) - 10:41, 21 December 2022
• Orpiment
  ...nt ranges in color from a bright lemon yellow to orange. It changes to the red crystalline form at 170C. Orpiment was used in many early civilizations at ...ast. Synthetic orpiment can be differentiated from the naturally occurring mineral form due to its smaller particle size (reported as fine to medium). The syn
  7 KB (1,049 words) - 12:56, 29 February 2024
• Barite
  A heavy, white mineral composed of [[barium sulfate]]. Barite occurs worldwide including Germany ( ...at (Deut.); bariet (Ned.); heavy spar; baryta; Bologna stone; desert rose (red color, flower-like formation)
  4 KB (461 words) - 09:24, 2 May 2022
• Jadeite
  ...called Ayah kyauk. Other colors include purple, blue, gray, black, white, red, pink, and orange. When heated to 1000 C, jadeite becomes glassy and may me
  4 KB (538 words) - 13:48, 28 December 2022
• Naples yellow
  ...ther pigments, such as [[cadmium yellow]], [[zinc white]], and [[Venetian red]]. Naples yellow is lightfast and chemically stable, but may darken with hi
  7 KB (961 words) - 11:04, 19 October 2022
• Opal
  ...ous with colors varying from pearly white, pale blue, gray, green, yellow, red and brown. High quality opals produce interference colors due to the presen
  4 KB (590 words) - 13:52, 4 January 2023
• Kaolin
  ...ities, such as iron oxide, silica, and other minerals, can produce yellow, red, blue, gray, or brownish color clays. Kaolin occurs at many locations aroun
  4 KB (569 words) - 12:36, 15 September 2022
• Titanium dioxide
  ...nium dioxide is often deeply coloured due to elemental impurities. Ground mineral rutile found some use as a colored pigment, but difficulties in grinding re | anatase: mineral 2.54-2.56; pure pigment (e.g., Titanox A) 2.3-2.65; composite (e.g., Titano
  14 KB (1,967 words) - 10:21, 29 August 2020

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