Description
This Presidium Coloured Gemstone Estimator PGT II is the industries most trusted professional coloured gemstone estimator that quickly and effortlessly identifies gemstones from Quartz, Aquamarine, Ruby to Diamonds and Moissanites.
Presidium are a leading manufacturer of high quality Gemmological Instruments and distribute to institutes, laboratories, jewellery manufacturers, diamond appraisal and retail businesses worldwide.
This second generation gemstone estimator has been redesigned to offer a more compact and sturdy tester.
Key features of this product include:
- Newly designed inbuilt glass and calibration (CAL) test discs for reference.
- Ability to separate up to 16 of the most common coloured gemstones based on their thermal conductivity, providing quick and direct results via a clear analogue display panel.
- Includes the thinnest retractable probe tip (0.6mm diameter), which tests stones as small as 0.02ct.
- Supplied with a protective case and pen lid.
- Powered by 2 x AA batteries. Supplied with a UK 3 Pin converter as an alternative power supply.
All of Presidium products are RoHS Compliant with the RoHS regulation as well as 4R Compliant with WEEE regulation.
This is a specialist product that requires careful operation and is intended for professional use only.
See our operation guidelines below:
- Constant pressure must be maintained between the probe tip and stone for accurate readings.
- When testing, ensure that the probe pen is upright otherwise results shown will not be accurate.
- An alarm will sound if the tip is touching metal.
- Stones must be clean before testing: gently rub the table of the gemstone with a soft cloth () or tissue paper.
- The probe tip must also be clean before testing: gently rub in a circular motion on paper. Please note – the probe tip is supplied with a minute protective clear cap that must be removed before use.
- Calibration of the tester may be required: on first use, testing in a different ambient temperature or when a new probe tip is installed.
- This product will not differentiate between natural and synthetic coloured stones.
- Coated gemstones can be tested.
Disclaimer:
All equipment must be used in conjunction with the user’s skill, knowledge and experience. Under no circumstances shall Cooksongold be liable for consequential loss sustained in connection with any item. It is your responsibility to regularly check equipment against known samples, to ensure that it has not developed a fault.
Please see instruction booklet on how to use this product attached in the FAQs below.
Please note – this product is supplied with 1 year warranty.
Catalogue Page Number p777






















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