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  2. The Rock (diamond) - Wikipedia

    en.wikipedia.org/wiki/The_Rock_(diamond)

    The Rock is G-color, which is the fourth whitest level of white diamonds. [2] It is the highest grade in the near-colorless color range and only professionals can see a slight tint of color in a G-colored diamond. [3] The diamond is 61.3 grams (2.2 oz) and it has dimensions of 5.4 centimetres (2.1 in) by 3.1 centimetres (1.2 in). [2]

  3. Herkimer diamond - Wikipedia

    en.wikipedia.org/wiki/Herkimer_diamond

    Herkimer diamonds are double-terminated quartz crystals discovered within exposed outcrops of dolomite in and around Herkimer County, New York, and the Mohawk River Valley in the US. [ 1 ] [ 2 ] They are not diamonds ; the "diamond" in their name is due to both their clarity and well formed faces.

  4. Luminous gemstones - Wikipedia

    en.wikipedia.org/wiki/Luminous_gemstones

    Both diamonds and white topaz may phosphoresce if heated below red heat. The phosphorescent quality of diamonds when heated by sunlight is usually believed to have been first revealed by Albertus Magnus (c. 1193–1280) and it was apparently rediscovered by Robert Boyle in 1663, who also found that some diamonds will luminesce under pressure.

  5. Moissanite - Wikipedia

    en.wikipedia.org/wiki/Moissanite

    As a diamond alternative, Moissanite has some optical properties exceeding those of diamond. It is marketed as a lower price alternative to diamond that does not involve the expensive mining practices used for the extraction of natural diamonds. As some of its properties are quite similar to diamond, moissanite may be used as counterfeit diamond.

  6. Jewellery - Wikipedia

    en.wikipedia.org/wiki/Jewellery

    It is an amulet, which comprises diamond, pearl, ruby, sapphire, emerald, topaz, cat's eye, coral, and hyacinth (red zircon). Each of these stones is associated with a celestial deity, representing the totality of the Hindu universe when all nine gems are together. The diamond is the most powerful gem among the nine stones.

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