Consumer Resources

Diamond, ruby, emerald, or sapphire? Round or cushion cut? How big? How small? And what is the best value? The questions can be complicated, and the answers will be different for everyone.

Even so, the best advice for buying a diamond or gemstone is actually quite simple: Get the facts.

A gemological report from a reputable, independent laboratory like GUA is one of the most powerful consumer tools available. And related resources can provide can provide the extra insight needed to make crystal clear decisions.

Learn more with GUA ’s online guides to buying a diamond, colored gemstone; gemological glossaries; and frequently asked questions.