Presidium Instruments Gem Indicator (PGI) Handheld Tester for Identifying Diamonds and Common Colored Gemstones

The only handheld tester in the industry specifically for colored gemstones that helps to indicate up to 31 dufferent types of colored gems based on their thermal conductivity and even features a color input function that allows users to select from a range of 12 common colors, thereby narrowing down the possible results. Easy-To-Read clear Digital LED Screen. Patented Replaceable Probe Tip Technology ensures minimal downtime. The Gem Indicator is an enhanced, more convenient handheld version of the Gem Tester/Colored Stone Estimator distinguishing between diamonds and other colored gemstones using the principles of thermal conductivity. The Gem Indicator probe consists of two linked thermometers, one which is heated electronically, while the other is cooled by the gemstone being tested. The difference in temperature creates an electrical output, which is then amplified and displayed on the new digital organic LED display. Simple to use, easy to maintain and quick in giving you intelligent results about your colored gemstones.