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  2. Tourmaline - Wikipedia

    en.wikipedia.org/wiki/Tourmaline

    Dispersion: 0.017 [1]: Ultraviolet fluorescence: Pink stones; inert to very weak red to violet in long and short wave [1]: Absorption spectra: Strong narrow band at 498 nm, and almost complete absorption of red down to 640 nm in blue and green stones; red and pink stones show lines at 458 and 451 nm, as well as a broad band in the green spectrum [1]

  3. Gemstone industry in Greenland - Wikipedia

    en.wikipedia.org/wiki/Gemstone_industry_in_Greenland

    A total of 6,974 metres of diamond drilling was completed in 65 holes. Ruby and pink sapphire was found in 48 of the holes. At Aappaluttoq, the ruby and pink sapphire mineralization occurs in a corundum (ruby-sapphire) alteration band that exhibits trench-to-trench and drill hole-to-drill hole continuity.

  4. Gemstone - Wikipedia

    en.wikipedia.org/wiki/Gemstone

    Paraiba Tourmaline has become one of the most popular gemstones in recent times thanks to its color and is considered to be one of the important gemstones after rubies, emeralds, and sapphires according to Gübelin Gemlab. Even though it is a tourmaline, Paraiba Tourmaline is one of the most expensive gemstones. [31]

  5. “Natural diamonds prevent most consumers from having a diamond size that looks best for the ring design due to the cost,” he says. ... 2FToi-et-Moi-Morganite-and-Pink-Tourmaline-Cocktail-Ring ...

  6. Gemstone irradiation - Wikipedia

    en.wikipedia.org/wiki/Gemstone_irradiation

    Intensely blue topaz does not exist in nature and is the result of artificial irradiation. [25] According to the American Gem Trade Association, approximately 30 million carats (6,000 kg or 13,000 lb) of topaz are irradiated every year globally, 40 percent of which were done in the United States as of 1988. [ 26 ]

  7. Morganite (gem) - Wikipedia

    en.wikipedia.org/wiki/Morganite_(gem)

    A single carat of morganite can cost about $300. [12] Morganite is one of the rarest members of the beryl family, second only to red beryl. Due to the scarcity of morganites, especially those of high quality, they tend to be among the most expensive per carat. [13] Ones that are deep pink in color tend to be the most valuable. [14]

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