Presidium OTI All-In-One Diamond Tester Casting Machines & Equipment The built-in heater reaches up

The built-in heater reaches up to 149°F (65°C)

Two different size mandrel holes to position ring and forming mandrels at the bench

This Extended Set Plus represents that remaining stock — consolidated into one comprehensive package for shops that want broad fixture coverage from a system that is no longer in production

GemOro Elite series microscopes feature internationally adaptable 100V–240V multi-voltage power that automatically adjusts to each country's specific voltage

These are not traditional cut files — they are ceramic-coated burnishing and finishing tools shaped like needle files

Presidium OTI All-In-One Diamond Tester Casting Machines & Equipment The built-in heater reaches upThe 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 simulantsincluding glass, sapphire, and cubic zirconiawhether the stone is loose or mounted in any jewelry setting. With a resistive