Covid-19 Opening hours update 12th April 2021: Gem-A Instruments is open for delivery, Click & Collect, and pre-booked on-site shop appointments.
Order online or contact instruments@gem-a.com to book your appointment.

Stone Testers

Stones testers often work with either a thermal probe, an electrical probe, or both, and are primarily used to identify whether a gemstone is a diamond or another material. Testers can be used on loose or set gems, and are quick and reliable – an important part of a gemmologist’s arsenal. Gemstones other than diamond can be tested and identified but the results must be applied with the appropriate gemmological knowledge, as many other stones have overlapping ranges for conductivity.

7 Items

per page
Set Descending Direction

7 Items

per page
Set Descending Direction