I have a Tiffany's 1.3 ct Diamond solitare ring. This is a GIA certified Tiffany & Co. Diamond Solitare Engagement Ring featuring a 7.00mm by 7.02mm by 4.35mm round brilliant cut diamond weighing 1.30 carats by formula of VVS-1 clarity and H color. This diamond is of excellent cut symmetry and excellent polish. It is a 6 platinum prong set and joins to the 2.2mm wide tapering cast mounting of high polish finish. Inner shank is engraved with "Tiffany & Co. 19797760 1.30 CT". This ring was appraised for $23,550 in October 2008. I will take below $20k for this ring. Please email or message me at colemke@yahoo.com

Here is a picture of the ring.

Best of luck with your sale.

I do have a question though. If you've got a GIA grading report on it, why are you estimating the weight by formula?

Neil

I copied the wording straight from the appraisal. I will upload the appraisal and GIA report and maybe that will answer anymore questions you have.