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  2. Orbicular jasper - Wikipedia

    en.wikipedia.org/wiki/Orbicular_jasper

    Orbicular jasper from Madagascar. Orbicular jasper is a variety of jasper which contains variably-colored orbs or spherical inclusions or zones. In highly silicified rhyolite or tuff, quartz and feldspar crystallize in radial aggregates of needle-like crystals which provide the basis or seed for the orbicular structure seen in this kind of jasper. [1]

  3. List of gemstones by species - Wikipedia

    en.wikipedia.org/wiki/List_of_gemstones_by_species

    Calcite. Manganoan calcite (var.); Caledonite; Canasite; Cancrinite. Vishnevite; Carletonite; Carnallite; Cassiterite; Catapleiite; Cavansite; Celestite; Ceruleite ...

  4. Heliotrope (mineral) - Wikipedia

    en.wikipedia.org/wiki/Heliotrope_(mineral)

    The red jasper may resemble spots of blood, hence the name bloodstone. Other colors of chalcedony may also occur in Indian bloodstone, such as white, yellow, or blue. This semiprecious stone should not be confused with other ornamental stones that contain red jasper.

  5. Jasper - Wikipedia

    en.wikipedia.org/wiki/Jasper

    Jasper, an aggregate of microgranular quartz and/or cryptocrystalline chalcedony and other mineral phases, [1] [2] is an opaque, [3] impure variety of silica, usually red, yellow, brown or green in color; and rarely blue. The common red color is due to iron(III) inclusions. Jasper breaks with a smooth surface and is used for ornamentation or as ...

  6. Luminous gemstones - Wikipedia

    en.wikipedia.org/wiki/Luminous_gemstones

    Scholars have suggested that the myth may have originated with snake worship, or light reflected by a serpent's eye, or the flame color of certain snakes' lips. In only a relative few of these legends is the stone luminous, this variant being known in India, Ceylon, ancient Greece, Armenia, and among Cherokee Indians (Ball 1938: 502).

  7. Jasperware - Wikipedia

    en.wikipedia.org/wiki/Jasperware

    Jasperware, or jasper ware, is a type of pottery first developed by Josiah Wedgwood in the 1770s. Usually described as stoneware, [2] it has an unglazed matte "biscuit" finish and is produced in a number of different colours, of which the most common and best known is a pale blue that has become known as "Wedgwood blue".

  8. Gemstone - Wikipedia

    en.wikipedia.org/wiki/Gemstone

    Even the same named gemstone can occur in many different colors: sapphires show different shades of blue and pink and "fancy sapphires" exhibit a whole range of other colors from yellow to orange-pink, the latter called "padparadscha sapphire". [39] This difference in color is based on the atomic structure of the stone.

  9. Gemstones in the Bible - Wikipedia

    en.wikipedia.org/wiki/Gemstones_in_the_Bible

    Red Jasper is the third stone in the third row of the priestly breastplate, representing the tribe of Issachar (Exodus 28:19, [2] 39:12 [3]); the Septuagint enumerates it among the riches of the King of Tyre (Ezekiel 28:13 [4]). Jasper is an anhydrate quartz composed of silica, alumina, and iron and there are jaspers of nearly every color ...