Presidium OTI All-In-One Diamond Tester Casting Machines & Equipment These are not traditional cut

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

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

ranging from Extra Extra Extra Coarse (120) through Extra Fine (1500)

6mm Jaw Length 31mm Maximum Wire Gauge 16 gauge (dead-soft wire) Maximum Sheet Gauge 24 gauge Variants Single version — no size or style options

Presidium OTI All-In-One Diamond Tester Casting Machines & Equipment These are not traditional cutThe 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