Editor’s Note
This article delves into the professional techniques used to authenticate diamonds and gemstones, offering readers reliable methods to verify their purchases in a market where even experts can face challenges.

Even professionals can struggle with certain pieces of jewelry. However, there is at least one reliable method to verify what you’re purchasing.
Today, we explore the tricks of the trade within the world of glitz and glamour: diamonds, jewelry, and gemstones.
The trading floor of the Pacific Stock Exchange, once located just across the freeway from the Marketplace headquarters in Los Angeles, is long gone. But a short walk in the other direction leads to a cluster of very much alive retail trading floors: approximately 1,500 jewelry shops housed primarily in art deco buildings.
How do all these businesses survive? Experts note that many shops sell on consignment, avoiding the enormous inventory costs associated with outright ownership of the diamonds, rubies, sapphires, and other precious and semi-precious items they sell. To truly understand this market, one must take an elevator 20 floors up to B&B Fine Gems. This company is a wholesale professional and a major player, currently preparing air cargo shipments of gems to Hong Kong for an upcoming trade show.
Dave Bindra, Vice President and Head of Acquisitions at B&B Fine Gems, displays sapphires from Sri Lanka, rubies from Burma, and a 90-carat peach tourmaline from Mozambique in a conference room at their office.
Bindra’s father, Ruben, founded B&B 40 years ago after immigrating to the U.S. from Punjab in Northern India. Dave learned the trade from his father and also completed the graduate program at the Gemological Institute of America (GIA), where he now serves on the board of governors.
The GIA is one of the few institutions that issue authoritative laboratory reports on gemstones.
This is a key Trick of the Trade: If you are spending a significant amount of money, insist on that certificate. For those without years of expertise, he advises against making such purchases while traveling abroad.
However, maintaining a good poker face is also crucial.
The poker face is useful in any market. Another key takeaway is to avoid being pressured into a purchase by a random stranger.
This sentiment is echoed by Mike Fried, CEO of The Diamond Pro, an online guide for buying diamonds—typically for engagement rings.
Fried also has extensive experience in the field. He spent considerable time learning to select the best diamonds during his tenure at the renowned diamond house, Leo Schachter.
One theory for how this jewelry district can support so many shops relates to Los Angeles’ status as an international tourist destination. Gems and jewelry are easily portable stores of value, which might appeal to shoppers from countries with unstable economies. However, Fried argues that the real selling point should be beauty, pure and simple. If you need a portable store of value, he suggests gold—a standardized commodity with a clear market price.
The age-old wisdom for buying diamonds is to remember the four Cs: cut, clarity, carat, and color. But if you’re not a professional, how do you apply this in practice?
There are good certifications, and there are less rigorous ones. The Diamond Pro is a helpful resource for determining which is which.
