Genuine Tiffany & Co diamond ring. Details can be seen on the picture of the diamond certificate eg color, cut etc but in summary, 0.38 carats, color E, VVS1 clarity. No inclusions, fluorescence etc. Bought in London 2006 for £2875.00 ($4933). Valued for insurance in 2012 for £3500 ($6006) so a great bargain here even if you just use the stone to make a new ring. Original certificate and valuation letter from purchase. I don't have the receipt or box. My ring size is 5.5. The inside of the band measures 16mm diameter.