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PRESIDIUM Gem Tester/Color Stone Estimator

PRESIDIUM Gem Tester/Color Stone Estimator
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Price: $199.00
Availability: In Stock
Item #: 25.618
Manufacturer: Presidium Instruments Ltd.
Average Rating: Not Rated

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Presidium Gem Tester / Colored Stone Estimator (PGT/CSE)

A light and portable instrument that instantly identifies diamonds and most colored gemstones based on their thermal properties

Presidium Gemstone Tester/Colored Stone Estimator is the only colored gemstone thermal tester in the industry. It provides a quick and easy way to identify diamonds and separate common colored gemstones from one another based on their thermal conductivity. Coated gemstones can also be accurately tested with the PGT/CSE.


The Presidium Gem Tester / Colored Stone Estimator has a retractable probe tip that ensures consistent pressure against the gemstone during testing for more reliable results. With the industry’s thinnest probe tip size of 0.6mm, PGT/CSE tests diamonds as small as 0.02ct.



·         Identifies diamonds and most colored gemstones

·         Tests both polished and unpolished gemstones

·         Tests gemstones as small as 0.02ct

·         Consistent and reliable results every time

·         No waiting time between tests

·         Clear and visible display for ease of reading measurements

·         Designed to be simple and easy-to-use

·         Light and portable tester that can be used anywhere


·         Retractable thermoelectric probe tip that ensures constant pressure between probe and gemstone

·         Industry’s thinnest probe tip (0.6mm) for testing diamonds as small as 0.02ct

·         Metal alert buzzer to ensure that probe tip is in contact with gemstone during testing

·         Clear and easy-to-read analog dial

·         Multi-colored gemstone display

·         No waiting time between tests

·         Built-in diamond and simulant test discs for reference

·         Powered by 2 x AA batteries or adaptor

·         Leather carrying case included

Dimensions and weight

·         Length: 165mm (6.5 inches)

·         Width: 77mm (3.03 inches)

·         Height: 77mm (3.03 inches)

·         Weight: 260g (without battery)

·         Weight: 272g

Power and battery

·         5 x AA batteries (approximately 4 hours of continuous use)

·         AC adaptor 120 / 230 volts (standard item provided by Presidium)

Measurement range

·         0.02 carat and above

Operating conditions

·         Operating temperature:      18°C-27°C (65°F-80°F)

·         Storage temperature:          34°C-51°C (30°F-125°F)

Package contents

·         Presidium Gem Tester / Colored Stone Estimator

·         Probe pen

·         Colored gemstone display

·         Built-in test simulant discs

·         AC adaptor

·         User handbook

·         Warranty card

·         Leather carrying case

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