Presidium Instruments is a pioneering brand that leads the industry in gemological instruments. With a commitment to research and innovation, Presidium develops cutting-edge instruments to benefit the diamond and gemstone industry. Their extensive range of products caters specifically to the jewelry industry, including innovative diamond testers for authenticating genuine diamonds, first-of-its-kind colored gemstone testers for differentiating types of colored gems, trusted gemstone gauges that can convert to estimated carat weight, and portable carat scales for up to 100 carats.

With over 40 countries worldwide and more than 130 authorized resellers, Presidium products are used in gemological institutes, laboratories, jewelry manufacturers, diamond appraisal businesses, and retail jewelers globally. Committed to social responsibility, all Presidium products are RoHS and WEEE compliant. Experience the precision and reliability of Presidium instruments for all your gemological needs