What is the average cost on a 6 prongs settings (platinum, 18k , or 14k white gold)? I have been shopping arround in a few local jewelry store (which would allowed me to observe the setting process) and was quoted the price from $500.0 to $750.00 (platinum settings). I currently have my 1.331 round diamond set into a 18k white gold bezel and would like to reset it in a 6 prongs settings so it would match with my earrings along with my future engagement ring (2+ carat round diamond set in a 6 prongs tiffany style). Would it make a big difference is price along with duration in platinum vs. 18k? Thank you in advance for all your responses.