Gem-A Thermal Diamond Tester - Gem-A Instruments

GemTrue Diamond Plus

Presidium Diamond Mate-A Tester

This is a portable electronic device for distinguishing real diamonds from other simulated stones. It is designed for quick, precise, and safe diamond tests. An excellent tool kit for the diamond tester, suitable for handling any exposed or inlaid diamonds and gems, as well as other jewelry and precious metal items. The diamond detector with voice instructions and audible sounds are emitted when the lights are on so that you can easily distinguish between masonry and stone.

Dupeakya Professional Diamond Selector II, Gem Tester Pen Portable Electronic Diamond Tester Tool for Jewelry Jade Ruby Stone, Black

Presidium® GEM Indicator PGI PRESIDIUM DIAMOND & GEMSTONE TESTERS - Jeweler's Tools, Supplies & Watch Batteries by Star Struck

Presidium Gem Tester II! Everything you need to know - Review

Presidium Instruments Gem Tester II (PGT II) with Poland

Eagletech Diamond Selector II Gem Tester Indicators – JG Superstore

Could they be diamonds - Gem Related Discussion - IGS Forums

Presidium Gem Tester II Color Diamond Tester

Presidium® Gem Tester II – ZAK JEWELRY TOOLS

Gemometrics

Know How to Identify Natural Gemstones

Gem Tester II (PGT II) Test Types of Natural Gemstones

Gemstone - Wikipedia