This gem was faceted from an unheated piece of zoisite/Tanzanite–most Tanzanite has been heated to remove the orange-brown and greenish-yellow components to make the gem a dark blue to purple-blue. In this gem there was a zone of blue and zone of yellow-green; when combined with the trichroism of zoisite the result was a remarkable gem that show multiple colors at the same time. As the gem is held in the hand you can see blue, green, yellow and even violet all flashing in the light.
I faceted this tanzanite in my custom “Orion” brilliant oval design; the resulting gemstone is bright and scintillating. There is tiny internal feather just barely visible in the macro image, but it’s not visible in the hand without a loupe. The gemstone weighs 3.35 carats and measures 9.9 x 7.8 x 6.5 mm.