Thank you for your reply, allure244.
I think I do want the Tiffany & Co brand. After reading several posts in this thread, it seems like there is a noticeable difference between getting a Tiffany DBTY versus a similar style necklace elsewhere. Tiffany seems to have mastered the right proportions of the chain and bezel and have diamonds that appear bigger than diamonds of equivalent carat size and are extra sparkly.
I ran over to the Tiffany store during my lunch break today. I tried on the different metals. I am fair to medium Asian skin tone. The RG looked okay but nothing special. The YG looked nice and had a nice contrast between the diamond and the bezel. However, as you said, it almost disappeared with my skin tone. I preferred a contrast between my skin and the chain so that narrowed it down to SS and Platinum. The SS is brighter, while the platinum is darker.
The SA showed me a couple different size diamonds and while the larger (around 0.3 ct) looked very nice, I wanted a smaller, daintier, everyday look so the 0.18 carat looked better. The SA said that the smallest diamond in platinum is 0.18 but the website shows smaller diamonds are available (0.8, 0.12, 0.14).
He said that diamonds at 0.18 carats and above are graded while smaller ones are not. Do you all think it's worth it to get a graded diamond? The 0.14 is about $400 less than the 0.18 but not sure if it won't look as good as the 0.18. If anyone has a 0.14 or 0.18 DBTY in platinum, I would love to see pictures.