enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Jasperware - Wikipedia

    en.wikipedia.org/wiki/Jasperware

    Wedgwood had introduced a different type of stoneware called black basalt a decade earlier. He had been researching a white stoneware for some time, creating a body called "waxen white jasper" by 1773–1774. This tended to fail in firing, and was not as attractive as the final jasperware, and little was sold. [7]

  3. Blueschist - Wikipedia

    en.wikipedia.org/wiki/Blueschist

    Blueschist on Île de Groix, France Photomicrograph of a thin section of blueschist facies metamorphosed basalt, from Sivrihisar, Turkey. Blueschist (/ ˈ b l uː ʃ ɪ s t /), also called glaucophane schist, is a metavolcanic rock [1] that forms by the metamorphism of basalt and rocks with similar composition at high pressures and low temperatures (200–500 °C (392–932 °F ...

  4. Shades of gray - Wikipedia

    en.wikipedia.org/wiki/Shades_of_gray

    An achromatic gray is a gray color in which the red, green, and blue codes are exactly equal. The web colors gray, gainsboro, light gray, dark gray, and dim gray are all achromatic colors. A chromatic gray is a gray color in which the red, green, and blue codes are not exactly equal, but are close to each other, which is what makes it a shade ...

  5. Porphyry (geology) - Wikipedia

    en.wikipedia.org/wiki/Porphyry_(geology)

    "Imperial Porphyry" from the Red Sea Mountains of Egypt A waterworn cobble of porphyry Rhyolite porphyry from Colorado; scale bar in lower left is 1 cm (0.39 in). Porphyry (/ ˈ p ɔːr f ə r i / POR-fə-ree) is any of various granites or igneous rocks with coarse-grained crystals such as feldspar or quartz dispersed in a fine-grained silicate-rich, generally aphanitic matrix or groundmass.

  6. Andesite - Wikipedia

    en.wikipedia.org/wiki/Andesite

    Andesite is usually light to dark grey in colour, due to its content of hornblende or pyroxene minerals. [2] but can exhibit a wide range of shading. Darker andesite can be challenging to distinguish from basalt, but a common rule of thumb, used away from the laboratory, is that andesite has a color index less than 35. [9]

  7. Wedgwood - Wikipedia

    en.wikipedia.org/wiki/Wedgwood

    Wedgwood developed an attractive reddish stoneware he called rosso antico ("ancient red") This was often combined with black basalt. [25] This was followed by caneware or bamboo ware, the same colour as bamboo and often modelled to look as though objects were made of the plant; first introduced in 1770, but mostly used between 1785 and 1810.

  8. Greenschist - Wikipedia

    en.wikipedia.org/wiki/Greenschist

    In the Middle Woodland period, greenschist was one of the many trade items that were part of the Hopewell culture exchange network, sometimes transported over thousands of kilometers. During the time of the Mississippian culture , the polity of Moundville apparently had some control over the production and distribution of greenschist.

  9. List of RAL colours - Wikipedia

    en.wikipedia.org/wiki/List_of_RAL_colours

    Possible lightness values are 15% through 90% in steps of 5% for monochromatic shades of grey (i.e. C = 0%) and 20% through 90% in steps of 10% and additionally 85% and 93%. Chroma values are also mostly confined to steps of 10% or 5%, but with some exceptions, and the maximum value varies.