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    Presidium Colored Stone Indicator, Digital LED Tester 31 Gemstones PGI NEW
    • Newest Presidium model, never used, tester still sealed.
    • With box, all accessories, booklets, USB wire and protective pocket.
    • Excellent handheld tester that recognizes between diamonds and 31 types of colored gemstones. This is the handheld version of Presidium's Gem Tester/Colored Stone Estimator.
    • It has a digital LED screen that allows you to select from 12 colors to make results even more accurate.
    • Changeable probe tip.
    • Works with batteries or the USB cord provided.
    • Detects stones based on thermal conductivity.

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