Presidium is recognised worldwide as a leading manufacturer of professional diamond testing equipment, setting industry standards through continuous innovation and precision engineering. Trusted by jewellers, goldsmiths, gemologists and diamond professionals alike, Presidium instruments deliver reliable results when identifying diamonds, moissanite and other diamond simulants.

The increasing availability of laboratory-grown diamonds (Lab Grown Diamonds) has created new challenges for the jewellery industry. Today's diamond testers must do more than simply identify a diamond – they also need to help distinguish between natural and laboratory-grown diamonds while providing accurate and consistent results.

Presidium offers a comprehensive range of diamond testing solutions for virtually every professional application. Whether you choose the Presidium OTi or ARI for advanced natural and laboratory-grown diamond verification, the SAM or Adamas for reliable diamond and moissanite identification, or the versatile Multi Tester III for fast everyday testing, Presidium provides the right instrument for every requirement.