How to Choose a Colored Gem Lab

Colored gemstones are sent to laboratories to determine their authenticity, verify their country of origin, or identify treatments. Deciding which laboratory to use depends on what you need to know. Services and philosophies differ from one lab to the next. Here are some factors to consider when you make that choice. Choosing a laboratory for colored gemstones can be confusing. For color, the choices are tougher than with diamonds because the labs differ greatly in what they offer and how they report the results. With diamonds, price and turnaround time are the key issues for many jewelers (JCK, September 1999, p. 122). With color, the type of information required is far more important than time or money. Authentication. The sophisticated new synthetic gemstones found on the market today make some gems difficult to authenticate. It’s therefore quite appropriate for a gemologist to

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