Estate 12.3ct Tanzanite Diamond and Emerald Cocktail Ring in 18k and Platinum

ID#: RG913 Tanzanite: One (1) cushion cut genuine Tanzanite stone measuring approximately 14.8mm x 12.6mm x 8.3mm, with an estimated weight of 12.3 ct. Very fine intense bright medium blue colour, very clean, lightly included.  Diamonds: Twenty-Eight (28) round brilliant cut diamonds, all measuring approximately 1.0mm to 2.6mm in diameter. Estimated calculated weight is 1.12ct.  Estimated clarity of all diamonds is VVS-VS, estimated to E-F colour.   Emeralds: Two (2) round faceted bright green, moderately included emeralds measuring approximately 1.7 mm in diameter, total estimated weight is 0.05ct.     Metal: 18k yellow gold (acid tested) and platinum. Ring Size: 9 3/4 Weight: 15.95g