Does anyone know what kind of appraisal Tiffany uses? I''m looking to buy a 1.12 ct, H, VS2, solitaire platinum ring from a private owner and he has a Gemological Appraisal Laboratory of America certificate with the ring. Is that a legitimate Tiffany''s appraisal? I''m not sure how Tiffany''s do their appraisals or certificates. The ring has a "Tiffany & CO PT 950" stamp on the inside, but I am not a specialist so I''m not sure whether it is real or fake. He is selling it to me for $2900 and so if it is authentic, then I would definitely get it. Please help?! I''ve attached the certificate and will be posting some pics. What do you think?