Rare Color Blue Tanzanite Gemstone 6.77 CaratsWas $5100 on Sale through 1 31 2020 This rare tanzanite looks like a sapphire more than it looks like a tanzanite. It is all blue with no violet. Steve Moriarty cut this gem in a step style antique cushion cut. It measures 12. 8 mm long 9. 5 mm wide and 7. 1 mm deep and has flawless to vvs clarity.. Tanzanite is enhanced by heat. The overall quality rating of this tanzanite is 969 out o 1000. This tanzanite like most tanzanites is color enhanced by