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  2. Tanzanite - Wikipedia

    en.wikipedia.org/wiki/Tanzanite

    A test of the stone with a dichroscope can easily distinguish these from genuine tanzanite, as only tanzanite will appear doubly refractive: the two viewing windows of the dichroscope will display different colors (one window blue, the other violet) when viewing genuine tanzanite, while the imitation stones are all singly refractive and will ...

  3. Zoisite - Wikipedia

    en.wikipedia.org/wiki/Zoisite

    Zoisite may be blue to violet, green, brown, pink, yellow, gray, or colorless. Blue crystals are known under the name tanzanite. It has a vitreous luster and a conchoidal to uneven fracture. When euhedral, zoisite crystals are striated parallel to the principal axis (c-axis). Also parallel to the principal axis is one direction of perfect cleavage.

  4. List of gemstones by species - Wikipedia

    en.wikipedia.org/wiki/List_of_gemstones_by_species

    Eilat stone; Epidosite; Glimmerite; Goldstone (glittering glass) Hawk's eye; Helenite (artificial glass made from volcanic ash) Iddingsite; Kimberlite; Lamproite; Lapis lazuli; Libyan desert glass; Llanite; Maw sit sit; Moldavite; Obsidian; Apache tears; Pallasite; Peridotite (also known as olivinite) Siilinjärvi carbonatite; Soapstone (also ...

  5. Gemstone Meanings: Power and Significance of the 25 Most ...

    www.aol.com/gemstone-meanings-power-significance...

    “The myriad of colors of gemstones alone transmit energy via the wavelength they occupy on the color spectrum,” Salzer says. ... “Another beautiful blue-purple stone, the tanzanite is ...

  6. Gemstone - Wikipedia

    en.wikipedia.org/wiki/Gemstone

    Nearly all tanzanite is heated at low temperatures to remove brown undertones and give a more desirable blue / purple color. [44] A considerable portion of all sapphire and ruby is treated with a variety of heat treatments to improve both color and clarity.

  7. Artisanal miner in Tanzania finds third rare tanzanite stone ...

    www.aol.com/artisanal-miner-tanzania-finds-third...

    Small-scale Tanzanian miner Saniniu Laizer struck a rare-gem lottery for the third time this summer, unearthing a 14-pound hunk of tanzanite worth $2 million. In June he had mined two stones ...

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