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Synthetic Diamond Screener II (SDS II)


Enhanced with additional features, the Synthetic Diamond Screener II is a portable desktop device developed by Presidium to help screen out Type IIa colorless diamonds (usually CVD/HPHT laboratory-grown diamonds) from the natural Type Ia colorless diamond.


Product Description

Product Description

The Synthetic Diamond Screener II is developed as a portable PRESIDIUM DIAMOND VERIFICATION INSTRUMENT® to screen out Type IIa colourless diamonds from natural Type IIa colourless diamonds. It is suitable for both loose and mounted stones, including melees as small as 0.02ct.

The Presidium’s Synthetic Diamond Screener II (SDS II) uses advanced technology that measures a diamond’s UV light transmittance ability. Easy to use and battery-operated, its indicator light bars give a blue light to indicate that the stone is a natural Type la colorless diamond and red light to indicate a Type IIa colorless diamond, which is likely to be laboratory-grown and created through chemical vapor deposition (CVD) or high pressure high temperature (HPHT) syntheses. The device gives clear and accurate results within two seconds.

Presidium’s Synthetic Diamond Screener (SDS II) has been ASSURE TESTED by an independent third party through ASSURE program and achieved 100% Laboratory-Grown Diamond Referral Rate.

Product comes with 1 year warranty.


  • 2 color coded (blue/red) indicator light bars to give clear results of mined Type Ia Diamond and Type IIa Diamond
  • Test button will blink in red to alert if the device is unable to detect any stone on the photo-detector
  • Exterior base rubber padding to ensure non-slip sturdiness and prevent scratches to surfaces
  • Streamlined ergonomic design that enhances portability and stability
  • Exterior USB port at back of unit for connecting to external power source
  • International voltage compatibility
  • Low battery indicator
  • USB power


  • Help to screen out Type IIa diamonds which are likely to be laboratory-grown diamonds
  • Tests on diamonds within a range in dimension from 1.5 mm in width and up to 5 mm in height (approx. 0.02 to 10ct size)
  • Tests on polished diamonds of popular cuts such as brilliant round cut, emerald cut, baguette cut, etc
  • Recommended to use on both loose and mounted diamonds (on jewelry with open-back setting)
  • For use on colorless diamonds from D Color down to J Color

*As recommended by Federal Trade Commission (FTC), the term “Laboratory-grown diamonds” refers to synthetic diamonds


  • Length: 13cm
  • Width: 10cm
  • Height: 6.5cm
  • Weight: 0.21KG


*PRESIDIUM DIAMOND VERIFICATION INSTRUMENT is a registered trademark of Presidium Instruments Pte Ltd.


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Additional Information

When subjected to this deep UV irradiation, Type Ia and Type IIa diamonds each absorb different amount of UV light. Type IIa diamonds allow more deep UV light to pass through and thus its UV light absorption ability is low. This difference in the light absorption is significant enough to aid in differentiating between colorless Type Ia and Type IIa diamonds and the device uses this as core principle of function.

Product comes with 1-year warranty.

Can be powered by 4 AAA batteries for product mobility or through its USB port connected to external power source.

USB cable and power adaptor provided with the device.