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Good Price ARI by PRESIDIUM separates syntetic (lab-grown) diamonds and moissanites from natural diamonds Purchase Now!

Verifying the origin of mounted diamonds has become a difficult yet important undertaking for the jewellery industry. Laboratory-grown diamonds are prevalent. Identification can be hard. Combine these factors with the often small sizes of stones and the limited testing options due jewellery settings – it is enough to challenge even the more experienced of jewellery professionals.

The ARI by Presidium has been created specifically to help with this task. This portable handheld instrument is easy to use, gives straight-forward results, and can identify whether a diamond is natural, or whether it requires further analysis. It can also identify the trickiest of diamond simulants; synthetic moissanite..

Designed for:

• Mounted and loose facetted stones Diamonds, laboratory-grown diamonds and synthetic moissanites
• Colour: Colourless (D – J) 
• Size: 0.02ct + Approximately 1.7mm in diameter
• Shape: Round brilliant cut and some fancy shapes.
• Cut quality: Very good +
• Simulants: Can identify synthetic moissanite only

The ARI works by analysing light reflected from the pavilion of facetted stones. Designed as a probe, the user simply places the probe tip at 90° to a stone’s table facet. The user initiates the test by pressing the probe carefully onto the surface. This triggers UV light to be shined into the material. Partial absorption of this UV light may occur as it passes through the material. Sensors in the base of the equipment analyse any light that is returned from the stone. Results are assigned by the ARI based on whether specific absorption features were detected in the returned light. An automated result will show up on the ARI’s digital screen within 3 seconds of testing.

List of possible results:

‘Diamond’ for natural diamond
Up to 98% of natural diamonds will gain this result.

‘Type IIa / HPHT / CVD’ for all type IIa diamonds
This includes a small percentage of natural diamonds and all colourless laboratory-grown diamonds. All stones that gain this result will require further tests and observations to determine origin.

‘Moissanite’ for synthetic moissanite
This includes the low-electrical conductivity synthetic moissanites.

Click here to view the ASSURE tested FACT SHEET

English User Handbook