Please note: we are currently experiencing technical difficulty with our email accounts. We are working hard to resolve this issue and apologise for any inconvenience caused. ×
Gem-A Instruments in London is open for delivery and click and collect.
Please note: the shop is not yet open for walk-in customers.

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