• Natural Untreated Afghanistan Blue Sapphire Gemstone

    Natural Untreated Afghanistan Blue Sapphire Gemstone
    AU $199.00
    AU $23.75 postage
    or Best Offer
  • Rarest Blue Untreated Sapphire

    Nice Untreated Natural sapphire
    AU $139.99
    AU $22.00 postage
    or Best Offer
  • Green Tourmaline Oval 7.33ct 14.5x10mm Loose Natural Gemstone Afghanistan

    This is a Light Green Tourmaline. It is sparkling light Green in color. The gemstone is beautiful even though it has visible inclusions. This natural gem has not been treated. It is a loose gem. Green Tourmaline Oval 7.33ct 14.5x10mm.
    AU $295.00
    AU $29.00 postage
  • 2.6 ct Natural Untreated Afghanistan Green Tourmaline Gemstone

    A very nice green Tourmaline Gemstone Color: wide color range, green, blue, yellow, pink, red, brown, colorless. Bi-color is common. Hardness: 7 - 7.5 Refractive index: 1.61 - 1.66 Density: 3.01 - 3.25 Chemical composition: (NaLiCa)(Fe11MgMnAl)3Al6((OH)4(BO3)3Si6O18) Crystal structure: trigonal Origins: Brazil, Madagascar, Namibia, Zambia, Sri Lanka, Russia, USA, Afghanistan. Tourmalines exist in different colors and are known for their bi-color or even tri-color varieties. The most expensive color varieties are intense green, blue and red.Heat treatment is occasionally applied to enhance the color of green or blue crystals. Yellow stones could be irradiated to improve their color or clarity.
    AU $59.00
    0 bidsEnding Today at 21:47 AEST15h 58m
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