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  • ...first discovered in Saxony by A. Breithaupt in 1817. It is a translucent stone that is usually white or creamy but also occurs in pale shades of yellow, b * C.W.Chesterman, K.E.Lowe, ''Audubon Society Field Guide to North American Rocks and Minerals'', Alfred A. Knopf, New York, 19
    2 KB (293 words) - 12:37, 26 April 2022
  • ...Olivine beads have been found in pre-Dynastic Egyptian jewelry. The opaque stone was found in Egypt, in the lava of Vesuvius and in the Eifel district of Ge * B.Aston, J.Harrell, I.Shaw, "Stone" in ''Ancient Egyptian Materials and Technology'', P.Nicholson, I.Shaw (eds
    3 KB (442 words) - 10:41, 21 December 2022
  • ...an iron ore, a brown earth pigment and, in ancient times, as an ornamental stone for small carved items such as beads and seals. The term limonite is someti * C.W.Chesterman, K.E.Lowe, ''Audubon Society Field Guide to North American Rocks and Minerals'', Alfred A. Knopf, New York, 19
    2 KB (298 words) - 12:38, 8 September 2022
  • [[File:Tansanitvt.jpg|thumb|Tanzanite stone]] * C.W.Chesterman, K.E.Lowe, ''Audubon Society Field Guide to North American Rocks and Minerals'', Alfred A. Knopf, New York, 19
    2 KB (316 words) - 15:25, 20 December 2022
  • ...ormerly Burma), Pakistan, and the U.S. (California). The semiprecious blue stone was, and still is, used for jewelry, mosaics and small carvings. Lapis lazu lazurite; lapis; Persian blue; Fra Angelico Blue; Armenian stone; blue stone; ultramarine blue (pigment); Lapislazuli, Ultramarin (Deut.); lapislázuli
    4 KB (557 words) - 13:37, 19 December 2022
  • ...30-75% [[aluminum oxide]]. In antiquity, bauxite was used as an ornamental stone. Currently it is used as a source for metallic [[aluminum]] and as a filler * C.W.Chesterman, K.E.Lowe, ''Audubon Society Field Guide to North American Rocks and Minerals'', Alfred A. Knopf, New York, 19
    2 KB (305 words) - 11:53, 2 May 2022
  • ...It was used as beads, amulets and seals and is still used as an ornamental stone and gemstone. The color and opacity can be changed by dyeing or heating. * C.W.Chesterman, K.E.Lowe, ''Audubon Society Field Guide to North American Rocks and Minerals'', Alfred A. Knopf, New York, 19
    4 KB (468 words) - 11:39, 3 January 2023
  • A semiprecious stone composed of dark green [[chalcedony]] with flecks of red [[jasper]] or [[he * C.W.Chesterman, K.E.Lowe, ''Audubon Society Field Guide to North American Rocks and Minerals'', Alfred A. Knopf, New York, 19
    2 KB (310 words) - 12:22, 19 December 2022
  • ...akota, Georgia, Tennessee, and California). The transparent to translucent stone can produce a sulfur-like odor when two pieces are rubbed together. Barite ...ita (Esp.); Schwerspat (Deut.); bariet (Ned.); heavy spar; baryta; Bologna stone; desert rose (red color, flower-like formation)
    4 KB (461 words) - 09:24, 2 May 2022
  • flintstone; Lydian stone; touchstone; gun flint; potter's flint; hornstone; chalcedony; flintsten (D * C.W.Chesterman, K.E.Lowe, ''Audubon Society Field Guide to North American Rocks and Minerals'', Alfred A. Knopf, New York, 19
    2 KB (336 words) - 14:59, 21 August 2022
  • ...ilding Stones Quarried in the United States Canada and other Countries.'', Stone Publishing Co, New York, 1925 * C.W.Chesterman, K.E.Lowe, ''Audubon Society Field Guide to North American Rocks and Minerals'', Alfred A. Knopf, New York, 19
    3 KB (341 words) - 13:51, 28 December 2022
  • ...ilding Stones Quarried in the United States Canada and other Countries.'', Stone Publishing Co, New York, 1925 * C.W.Chesterman, K.E.Lowe, ''Audubon Society Field Guide to North American Rocks and Minerals'', Alfred A. Knopf, New York, 19
    3 KB (352 words) - 14:05, 19 December 2022
  • ...usually contains small amounts of iron, calcium, and magnesium. The tough stone is hard enough to scratch glass. Though less common than [[nephrite]] (the * C.W.Chesterman, K.E.Lowe, ''Audubon Society Field Guide to North American Rocks and Minerals'', Alfred A. Knopf, New York, 19
    4 KB (538 words) - 13:48, 28 December 2022
  • ...S. (Pennsylvania, Arizona, New Mexico and Utah). The translucent to opaque stone is sky-blue in its natural state, but appears green when ground into a fine * C.W.Chesterman, K.E.Lowe, ''Audubon Society Field Guide to North American Rocks and Minerals'', Alfred A. Knopf, New York, 19
    4 KB (514 words) - 11:26, 23 December 2022
  • ...ilding Stones Quarried in the United States Canada and other Countries.'', Stone Publishing Co, New York, 1925 * C.W.Chesterman, K.E.Lowe, ''Audubon Society Field Guide to North American Rocks and Minerals'', Alfred A. Knopf, New York, 19
    3 KB (336 words) - 15:11, 9 September 2022
  • A pink [[quartz|quartz]] used as a [[gemstone|gemstone]] and ornamental stone. Rose quartz has been mined or gathered since the early iron age (1200-500 * C.W.Chesterman, K.E.Lowe, ''Audubon Society Field Guide to North American Rocks and Minerals'', Alfred A. Knopf, New York, 19
    3 KB (366 words) - 11:00, 16 December 2022
  • tinstone; tin stone; wood tin; stream tin; Zinnstein (Deut.); Kassiterit (Deut.); cassitérite * C.W.Chesterman, K.E.Lowe, ''Audubon Society Field Guide to North American Rocks and Minerals'', Alfred A. Knopf, New York, 19
    3 KB (350 words) - 13:47, 18 May 2023
  • ...as citrine are actually heat-treated [[amethyst|amethysts]]. Ametrine is a stone that contains both citrine and amethyst, i.e. zones of purple and yellow. * C.W.Chesterman, K.E.Lowe, ''Audubon Society Field Guide to North American Rocks and Minerals'', Alfred A. Knopf, New York, 19
    3 KB (373 words) - 12:40, 26 December 2022
  • ...(Pennsylvania, Idaho, Nevada). Anglesite is a lustrous white to colorless stone that can be transparent or opaque. It is primarily used as an ore source fo * C.W.Chesterman, K.E.Lowe, ''Audubon Society Field Guide to North American Rocks and Minerals'', Alfred A. Knopf, New York, 19
    3 KB (360 words) - 10:20, 8 December 2022
  • ...ing to study sodium sulfate crystallization in monumental porous carbonate stone" ''Studies in Conservation'' 42 (1997), p. 115-125. * C.W.Chesterman, K.E.Lowe, ''Audubon Society Field Guide to North American Rocks and Minerals'', Alfred A. Knopf, New York, 19
    3 KB (400 words) - 11:22, 2 June 2022

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