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  2. Doublet (lapidary) - Wikipedia

    en.wikipedia.org/wiki/Doublet_(lapidary)

    A doublet is a type of assembled gem composed in two sections. [1] It is sometimes used to imitate other, more expensive gems. Opal Doublet. A garnet and glass doublet uses a top portion of natural garnet fused to any color of glass to imitate a gem. The color of glass used in the doublet is all that is seen, as the garnet provides no color.

  3. Opal - Wikipedia

    en.wikipedia.org/wiki/Opal

    Opals too thin to produce a "natural" opal may be combined with other materials to form "composite" gems. An opal doublet consists of a relatively thin layer of precious opal, backed by a layer of dark-colored material, most commonly ironstone, dark or black common opal (potch), onyx, or obsidian. The darker backing emphasizes the play of color ...

  4. Ammolite - Wikipedia

    en.wikipedia.org/wiki/Ammolite

    Ammolite is an opal-like organic gemstone found primarily along the eastern slopes of the Rocky Mountains of North America.It is commonly unearthed by natural erosion or through the process of various mining practices, within the perimeter of an ancient sea bed called the Western Interior Seaway. [2]

  5. Slocum stone - Wikipedia

    en.wikipedia.org/wiki/Slocum_stone

    Slocum stone (sometimes sold as "Slocum opal") is an early opal simulant which was briefly popular prior to the introduction of synthetics and less expensive simulants. [1] It was named after its inventor, John L. Slocum (1920–1998) [2] of Rochester, Michigan. [3] John Slocum experimented during the 1960s with various methods.

  6. World's most expensive opal literally glows in the dark - AOL

    www.aol.com/news/2015-08-13-world-s-most...

    In fact, as it gets darker around the opal, the opal appears ever more vibrant. The stone's vivid and sparkly nature is in stark contrast to Coober Pedy, Australia where it was discovered.

  7. Oregon tops expanded College Football Playoff bracket as ...

    www.aol.com/oregon-tops-expanded-college...

    Oregon, Georgia, Boise State and Arizona State all earned first-round byes in the College Football Playoff bracket.

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