Exceptional stone showcasing a Vivid Blue color, remitting to the colors of Kashmir and Royal Blue Sapphires.
Furthermore the cutter showed great craftsmanship and it is well cut, proportional, and the color is evenly distributed throughout the stone. The pavilion was not made wide, which is a common practice to gain extra weight.
 
Details and description:
Cut: Oval, Mixed Cut
Dimensions: 12.80 x 10.05 x 6.98mm
Weight: 6.30ct
Color: Vivid/Deep Blue (Purplish) - with Fine Color Quality
Certificate: ALGT83470134
Origin: Tanzania
 
Pictures might not do justice to the stone true colors, as the color is out-of-gamut for most computer monitors.
 
Tanzanite's are doubly refractive and a slight purplish undertone can be seen when rotating the stone in certain angles. It is also mentioned on the certificate.
 
This exceptional gem is mined only in one place in the globe.  With its resources almost depleted, it is rarer than diamond and a stone that gets rarer day by day.