With more varieties than ever before to choose from, including altogether new gems, revolutionary new cuts, and new ways to buy gems—such as Internet auctions and TV shopping—there has never been a more exciting time to buy or collect colored gemstones. But there are also new high-tech treatments and sophisticated frauds to look out for. Lack of information, error, or misrepresentation can make the thrill of buying a gem or piece of jewelry confusing, intimidating, overwhelming, and costly. Buyers need a source of expert guidance.