Hi all, I’m thinking of trading my Tiffany setting 1.39 e Vs2 diamond solitaire into a jewellers for a generic 2 carat e vs2 solitaire. What would you all expect the difference to be and be considered a fair trade? The stone I’m considering is retailing for 19k gbp... I know there is approximately 1/2 carat of difference versus the Tiffany brand.. how much would be a fair difference in price between them both. The 2 carat has also a gia certificate dated 1996 so the stone is vintage 30 yrs old. Was GIA as strict back then as they are now?I’ve attached a copy of both certs for comparison...