I''ve been lurking on Priscope for a few weeks now and I got some great info on purchasing a diamond to replace my lost ering. I''ll try to post picture of my new ring when I get it in a few weeks. Anyway, I bought a pair of 6mm stud pearl earrings for $7 at a consignment shop and I got them home and the backing on them has k18 marked on them. I''m assuming this is the same as 18k and I also assume that this must mean that the pearls must be fairly high quality to be set in 18k. They are a creamy pink and I can see my reflection in them so I think they have a pretty good luster. I was thinking of having them set with a little diamond underneath them. Do think they would be worth it?