Natural Untreated Oval Tanzanite Gemstone 3.12 CaratsOne natural color 3. 12 carats oval tanzanite, SI1 clarity, cut grade excellent, measuring 8. 1 mm wide, 10 mm long, 6 mm deep; with excellent polish and excellent symmetry. The proportions of the tanzanite are as follows: total depth 74%, table width 48%. The tanzanite also has a crown angle of 42 and a pavilion angle of 41. If heated this tanzanite would have a fine deep violet blue color. Sold to Darrell Dixon