Large pieces of jewelery are surprisingly versatile. I like them styled over crazy prints (shown left) or simple grey knits (shown right). If you were wondering how to spruce up your many simple American Apparel tops, this would be a good way to do it. I've been on the lookout for a grand necklace at thrift stores but I've only found a few interesting broaches myself.
Images from left to right: UK Vogue August scanned by Manuva from tfs.com, Harpers Bazaar August 2008 scanned by Faith Akiyama from tfs.com