Gemological Laboratory of America (GOA), located at 55 West 47th Street in New York City, is an independent gems and jewelries appraisal company. With decades of experience and experts specializing in all types of gems, from diamonds to rubies, different types of pearls to gold jewelry among others, we offer an impeccable analysis and will certify your gemstones and precious metals.

GOA has an immaculate understanding of the myriad variants of different gemstones as well as precious metals. The variants could be natural or artificial, as a part of manufacturing process or any treatment that the gemstones and precious metals may have undergone. Bearing all possibilities in mind, GOA conducts a holistic assessment of every piece of gem or metal and every piece of jewelry in its entirety to accord the appropriate certification.

GOA has been catering to wholesalers and retailers, private jewelers and insurance companies. The extensive appraisals and definitive certification after conducting all necessary tests at our state of the art laboratory will secure peace of mind, assure you certainty and help you to excel at your niche with indisputable reliability. With our stamp of approval, you would never have to second-guess the quality of a gemstone or precious metal, nor would your customers and clients.