Tiffany & Co, Tiffany platinum solitaire .64ct "Botswana Sort" platinum diamond ring. Featuring one claw set round brilliant cut Botswana Sort* diamond of known weight .64ct, G colour, VS1 clarity, Excellent cut grade, no fluorescence, as per Tiffany & Co diamond certificate 62912367 / T01290803, in a four claw setting, ring shoulders are grain set with 14 round brilliant cut diamonds in channel settings of approximately .20cts. Ring size L. Finished weight 3.70 grams. Comes with box and paperwork. How does Tiffany define Botswana sort''