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    Vivianite from Tomokoni Adit, near Canutillos Mine, Potosi Department, Bolivia

    Tanzanite Color | Violet Tanzanite | Tanzanite Value |

    Rutile on Chlorite in Quartz

    Citrine Crystal Ball

    Tourmaline. There are lots of pics of the red and green, but you don't see much of this. So beautiful.

    Quartz with Dumortierite Inclusions



    Diopside Merelani Hills, Arusha, Tanzania Taille=3.3 x 1.3 x 0.7 cm

    Carat Green Diamond



    Rutile star in quartz

    Ethiopian Mezezo Chocolate Opal Specimen

    Malachite replacing Azurite, Green Blue Crystals

    Just months ago, a 29.6ct blue diamond from Petra Diamonds' Premier Mine sold for more than £15 million at auction. If this latest find is valued similarly - £508,000 per carat - it could fetch more than £60 million.

    Synthetic red diamond, treated color, 0.55 ct.

    Red diamonds can by modified by purple, orange or brown.. This 0.76 ct diamond from the Argyle Mine in Australia is a purplish red.

    The 5.11 ct Fancy Moussaieff Red. Most other reddish diamonds are "cooler" in appearance and termed purplish red. Courtesy of William Goldbe...

    The 0.95 ct Hancock Red, auctioned by Christie's New York on April 28, 1987. ©GIA & Tino Hammid

    Gem stone cutting illustration, 1950s

    I never saw anyone on that roof terrace, although someone must have watered the plants and swept the tiles. I used to wonder about whose it was, and why did they never seem to use it?

    Carletonite - rectangle