Presidium OTI All-In-One Diamond Tester

Confirm what a stone is before you buy it, set it or quote a repair on it. The Presidium OTI All-In-One Diamond Tester combines dual optical and thermal testing technology into a single probe, delivering fast, reliable diamond authentication for professional jewelers and gemologists. This versatile instrument distinguishes natural diamonds from lab-grown diamonds, moissanite and common simulants such as glass, sapphire and cubic zirconia, whether the stone is loose or mounted in a jewelry setting. A resistive touchscreen interface, an ergonomic form factor and a replaceable probe make it a tool built for daily professional use in bench or retail environments.

Features

• Dual optical and thermal testing technology combined in a single probe
• Identifies natural diamonds versus lab-grown diamonds, moissanite and common simulants (glass, sapphire, CZ)
• Tests both loose and mounted stones across all jewelry settings
• Replaceable probe reduces downtime and extends the working life of the unit
• Clear resistive touchscreen display with 6-language interface
• Ergonomic, portable design suited for bench and point-of-sale use
• User-safe UV light function shuts off automatically when not in use
• Auto shutdown and low-battery indicator for uninterrupted workflow

Compatibility

Tests colorless polished diamonds with a minimum table width of 1.6 mm, loose or mounted in any jewelry setting.

Notes

Batteries are not included. Run the OTI on three AAA lithium batteries, rechargeable or non-rechargeable, or from a USB power bank, and expect up to 1.5 hours of continuous use per charge or set.