Category: Presidium Diamond Verification Instrument®

ARI by Presidium

SGD $1,479.00

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ARI by Presidium is a handheld diamond and moissanite screener that distinguishes colorless diamonds from CVD/HPHT lab-grown diamonds or moissanites—for loose and mounted stones

Adaptor not included.

Optical Probe TIp for ARI

SGD $69.00


SGD $35.00
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ARI is developed as a handheld PRESIDIUM DIAMOND VERIFICATION INSTRUMENT® to help identify colourless diamond against CVD/HPHT lab grown colourless diamond and all types of moissanite.

It is suitable for testing on both loose and mounted stones, including jewelry pieces with a closed back setting. Through advanced proprietary technology, ARI measures the UV light absorbance ability of diamond and moissanite. With its touch screen colour LCD display, ARI provides a clear and accurate result of “Diamond”, “CVD/HPHT/Type IIa” and “Moissanite” within 3 seconds. 

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


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  • User-safe UV Retractable Optical Probe activates only when tip is in contact with the diamond
  • Alert Buzzer for loss of contact between optical probe tip and diamond during testing
  • A 6-Language selection in the Graphic User Interface (GUI)
  • Battery operated with stylish ergonomic design for portability and ease of use
  • Tests on colourless diamonds and moissanites from D to J colour
  • Catered for both left-handed and right-handed users alike
  • Optical Tip assessment tool in settings


  • Identifies colourless diamonds against Lab Grown CVD/HPHT diamonds and all types of moissanites, including the new “low conductivity” moissanites
  • Tests on loose or mounted diamonds in all jewelry settings, including closed-back setting
  • Replaceable Optical Probe tip technology for users to replace any worn or damaged probe tips yourself, minimizing any equipment downtime
  • Instantaneous results in 3 seconds for consecutive testing
  • Tests on polished diamonds and moissanites of all proportional cuts as small as 0.02ct


Power & Battery

3 x AAA alkaline batteries (up to 4 hours of continuous usage) or AC adaptor

Standby time: 10 minutes from the last measurement

Recommended Operating Conditions

Operating Temperature: 18°C - 27°C (65°F - 80°F)

Storage Temperature: 10°C - 51°C (50°F - 124°F)

Air Relative Humidity: 35 - 65%


Dimension & Weight

Length: 190mm (7.5 inches)

Width: 46mm (1.8 inches)

Height: 25mm (0.9 inches)

Weight (without batteries): 60g (0.13lb)

How It Works