Traditionally diamond, but occasionally sapphire, emerald or pearl, engagement rings are a very personal choice and we work to make this a once in a lifetime experience. Douglas R. Harris will explain how you can avoid making mistakes in buying diamonds, how diamonds are chemically treated and altered, how to identify improper grading and how to identify fake certificates. Our standards are those of the Gemological Institute of America and The American Gem Society. The Gemological Institute of America is an internationally recognized leader in gem education, research and laboratory services. Committed to protecting all purchasers of gemstones, the institute developed the International Diamond Grading System and the famous 4Cs of diamond quality.