About Us

As the first company in the world to launch numerous gemological instruments, Presidium is committed to research and developing innovative instruments for the benefit of the industry.

Presidium Instruments Pte Ltd, incorporated in 1979,

is the world’s leading manufacturer of gemmological instruments that test and measure diamonds and gems, for the diamond and gemstones industries.

Catering specially to the jewelry industry, products include:

  • Innovative Diamond Testers (to authenticate genuine diamonds)
  • First-of-its-kind Coloured Gemstone Testers (to differentiate types of coloured gems)
  • Trusted Gemstone Gauges (with ability to convert to estimated carat weight)
  • Portable Carat Scales (for up to 100 carats)

News

Scales

The Presidium Carat Scale-50 is the first portable carat scale to be certified “Legal For Trade” by the U.S. National Conference of Weight and Measurement.

The Presidium Carat Scale-100 is an affordable convenient scale that measures gemstone weights up to 100 carats with conversion to grams (20grams).



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Engraver

A compact and sturdy engraving machine that provides ease of customization by engraving lettering on inside ring surfaces.

User-friendly engraving instrument that comes with an engraving diamond tip, a circular dial template, a complete set of operating instructions, a dust cover, and five brass sample rings.



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Synthetic Diamond Testers

Enhanced with additional features, the Synthetic Diamond Screener II now tests for diamond melees as small as 0.02 carats with instantaneous results, through the measurement of UV absorption.

Helps to screen out Type IIa colorless diamond, which is likely to be synthetic and created through chemical vapor deposition (CVD) or high pressure high temperature (HPHT) syntheses, from the natural Type Ia colorless diamond.



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