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Presidium DUO Tester - Jewels & Tools
Presidium Duo Tester (PDT) is the only comprehensive tool on the market that combines two proven testing methods for gemstones. PDT differentiates,
Presidium DUO Tester
Presidium Multi Tester III Diamond Moissanite Tester
Presidium Duo Tester PDT II. OF PRESIDIUM PRODUCTS. PDT II differentiates diamonds from its simulants based on both their thermal conductivity and
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