Image 1

Presidium DuoTester

  • Product Description

    The DuoTester combines the Presidium Reflectivity Meter and the Presidium Gem Tester/Colored Stone Estimator into one convenient identifying instrument, giving you portable        Diamond testing with Thermal Conductivity and Reflectivity measuring in        the same affordable instrument, the only tool on the market that provides the        user with two proven tests for Diamonds and the ability to differentiate        between similarly Colored Gemstones!  Double the confidence in testing for Diamonds against all known Simulants, including Synthetic Moissanite!

    The easy-to-read dial of the        DUOTESTER (see close-up photo) is calibrated to indicate the differences in thermal        conductivity of the most popular gemstones and simulants. Simply touch        the tip of the thermal conductivity probe pen to a mounted or loose        stone. Diamond is easily identified by any reading in the green area of        the dial, and colored gemstones can be easily differentiated from one        another by the clearly labeled zones provided in the red area. Even        coated gemstones can be accurately tested.  

    The Presidium Gem Tester can easily distinguish between the following gemstones, a total of 16 species:




    Tanzanite Jadeite vs. Chrysoprase
    Sapphire vs. Iolite Jadeite vs. Aventurine
    Sapphire vs. Spinel Ruby vs. Spinel
    Sapphire vs. Citrine Ruby vs. Garnet
    Sapphire vs. Topaz Topaz vs. Aquamarine
    Sapphire vs. Tourmaline Topaz vs. Amethyst
    Emerald vs. Jadeite Topaz vs. Citrine
    Emerald vs. Garnet Spinel vs. Garnet
    Jadeite vs. Garnet Gemstones vs. Glass

    The Thermal Conductivity test of the Presidium DuoTester can be applied not only to Faceted gemstones, but also Cabochons, as well as Gemstone rough.

    Diamond                and its simulants reflect light proportionally to their                respective refractive index. The PRESIDIUM DUOTESTER provides                the user with a digital reflectivity meter and an easy to use                Simulant Reflectivity Chart. The reflectivity number from the                meter is simply cross-referenced with the chart to identify the                stone. An unknown gemstone can be tested for its thermal                conductivity and, if necessary, the results can be confirmed                with a quick and simple reflectivity test. All stones indicated                as diamond by the thermal tester should be tested with the                reflectivity meter to test for Synthetic Moissanite, thus                providing double the assurance for the same price.

    Your purchase will also include an expanded Reflectivity chart covering the entire universe of stones, 54 species in all, from Glass through Colored Stones, and into Diamond and its various simulants.

    This Reflectivity test is designed for use on Faceted stones only, but this instrument tests across the whole range of gemstone species, from lowly Glass, through the full range of Colored stones, into the Diamond simulants, and through Diamond and Synthetic Moissanite.

    Easy        Fail Safe Calibration The        PRESIDIUM DUOTESTER comes complete with built in diamond and simulant        test discs for easy calibration of the thermal tester. Calibration of        the Reflectivity Meter is made easy with the optional, built-in Diamond        simulant set, consisting of seven different species of faceted gemstones, including High Zircon, Strontium Titanate, GGG, YAG, Cubic Zirconia, Synthetic Spinel, and Synthetic Sapphire.

    Convenience The        thermal probe pen includes a metal warning detector that emits a audible        buzz if the gem mounting is accidentally touched. The DuoTester can be        powered by 5 AA alkaline batteries or by the 100V/240V Global A/C  electrical adapter provided.

    Guaranteed        Quality The        PRESIDIUM DUOTESTER is manufactured under rigid quality standards. The        user is assured of the highest satisfaction and dependable service from        this PRESIDIUM instrument. Each DUOTESTER is tested for functionality        before shipment.        

    1        year factory warranty

    Size: L-165mm x W-77mm x H-77mm         Weight: 319 grams

    For the DuoTester version with the set of Diamond simulant gemstones, choose that option from the drop-down arrow below.

  • Product Reviews


    This product hasn't received any reviews yet. Be the first to review this product!

    Write A Review

  • Find Similar Products by Category