Sarasota Gemological Laboratory is a high profile laboratory that appraises fine diamonds and colored stones, as well as fine gemstone jewelry of all periods. An uncommon state-of-the-art laboratory, SGL services local, national & international clientele using advanced instrumentation such as the powerful SAS-2000 spectrophotometer, the latest high resolution OGI NovaScope measuring instrumentation, the cutting edge Octonus DiamCalc software developed by scientists of Moscow University, and optical analysis tools such as Hearts & Arrows viewers & the IdealScope.


Established in January of 1987, Sarasota Gemological Laboratory is directed by Richard Sherwood. Richard is a nationally and internationally recognized expert, with extensive experience in the gemstone and jewelry industry since 1980, along with a Graduate Gemologist diploma awarded by the Gemological Institute of America in 1985.