Presidium PGT II Gemstone Tester for Diamonds, Moissanite and Coloured Gemstones

Product Description

Compact, sturdy, and portable, this gemstone tester provides a fast way to identify diamonds or moissanite and to separate up to 15 common coloured gemstones by thermal conductivity. The clear analog dial is easy to read, and a retractable probe maintains consistent contact pressure on the stone for reliable results. With a 0.6mm probe tip, it can test stones as small as 0.02ct. Coated gemstones can generally be tested as well.

Key Features

• Detachable probe pen: Retractable thermoelectric tip maintains constant pressure on the stone
• Ultra-fine tip: 0.6mm probe tests stones down to 0.02ct
• Metal alert buzzer: Confirms the tip is on the gemstone, not the setting
• Analog display: Clear, direct readout for quick identification
• Reference discs: Built-in glass and simulant test discs for comparison

Benefits

• Identifies diamond or moissanite and separates many common coloured gemstones
• Works on polished and unpolished stones
• No warm-up time between tests
• Simple operation for bench or retail use

Power & Specs

• Power: 2 × AA batteries or external adaptor
• Minimum stone size: ~0.02ct (with 0.6mm probe)
• Test method: Thermal conductivity

Limitations

• Does not distinguish diamond from moissanite (use a dedicated moissanite tester if needed)
• Does not determine whether gemstones are natural or synthetic