Designers' Marks on Vintage Jewelry

There is something exciting about going to a yard sale, picking up a lovely piece of vintage jewelry, bringing it home, then upon closer inspection discovering a designer mark on the back. Some are well known like Monet and Coro and others are not so well known like A&Z. I was trying to figure out a designer's mark on a brooch to sell on Ebay and came across a super website with great pictures of designers' marks that are then identified. While it is not comprehensive, it is a wonderful reference if you're trying to figure out the mark on the back of that brooch or earring set. The site is by Morning Glory Antiques and Jewelry which also features and sells beautiful things. However, I really like it when a site gives a little information too--smart idea since I will probably visit the site more often if it is a valuable resource. Here is the link>>>Morning Glory Antiques and Jewelry.