Jewelry Information Guide Before making a purchase we recommend you take the time to learn a few of the qualities imperative to selecting the finest jewelry available and how to care for it once it's yours. The following links will provide you with important information regarding diamonds and jewelry in general. Before You Buy: Here you will find information you may want to know before purchasing jewelry. The Four C's: The "Four C's" are the four important qualities to measure when examining a diamond. Finishing: This section provides details about enhancing stones through different finishing processes. Birthstones: Here you will find details and brief histories regarding each different birthstone. Do's and Don'ts: This section will advise you on the proper steps in caring for your jewelry.