Tiffany, Cartier, Kwiat, some VCA (mainly metal and diamond pieces), Dana Rebecca, Cathy Waterman rings and studs, Cannon Lewis, DY, Dawes Designs, the designs of Gurhan and Heather Moore but not the price tags, Jamie Joseph gemstone pieces (the boulder opals are just breathtaking), Vale, and pretty much all jewelry I guess! Haha
Although I don't own a ton of jewelry, my favorite designer is Simon G! I love his mixed metals and mixed diamond color pieces!
I like Tiffany's silver items such as bracelets and necklaces for casual everyday type of wear. Some of the more delicate gold items are lovely too.
Although I have not seen any Kwiat pieces in person, I often find myself drooling over their beautiful designs online. I seem to be especially attracted to their fashion rings!