Collections: Electronic diamond & gem testers

These cost from £50.00 to £500.00, yet there is no one machine that 100% guarantees you have a diamond or 'guarantees' the name of a gemstone - such machines simply do not exist. Browse several articles explaining what these machines can, and can't, do - all beautifully-written in plain English. 


  • Diamond selector II, original Japanese tester by CULTI
    Regular price
    £37.50
    Sale price
    £37.50
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    Out of stock
  • Diamond selector II, copy Chinese tester
    Regular price
    £19.50
    Sale price
    £19.50
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    Out of stock
  • SAM multi-tester
    Regular price
    £359.00
    Sale price
    £359.00
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    per 
    Out of stock
  • Presidium Multi Tester III (model PMuT III)
    Regular price
    £299.00
    Sale price
    £299.00
    Regular price
    £329.00
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    per 
    Out of stock
  • Moissanite tester by GemVue (Moissanite Plus)
    Regular price
    £49.50
    Sale price
    £49.50
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    Out of stock
  • Multi tester for diamond, Moissanite, ruby, sapphire. Experior by Gemtrue
    Regular price
    £195.00
    Sale price
    £195.00
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    Out of stock
  • Standard Presidium Electronic Gem Tester (model PGT II)
    Regular price
    £259.00
    Sale price
    £259.00
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    Out of stock
  • Handheld presidium gem tester +3x AAA batt (model PGI)
    Regular price
    £299.50
    Sale price
    £299.50
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    Out of stock
  • Presidium Duo gem tester (model PDT-II)
    Regular price
    £394.99
    Sale price
    £394.99
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    Out of stock
  • Digital refractometer by Presidium (model Prim II)
    Regular price
    £349.00
    Sale price
    £349.00
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    Out of stock
  • Set of Sample Diamond Imitations
    Regular price
    £222.00
    Sale price
    £222.00
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    Out of stock
  • Calibration discs for Gemtest-PGI
    Regular price
    £39.50
    Sale price
    £39.50
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    Out of stock
  • Probe for Gemtest-PGI
    Regular price
    £58.80
    Sale price
    £58.80
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    Out of stock
  • Presidium standard+duo probe, new (after oct 2020) models
    Regular price
    £79.00
    Sale price
    £79.00
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    Out of stock
  • Power Supply (for 240v UK mains)
    Power Supply (for 240v UK mains) - Photograph 2
    Regular price
    £15.00
    Sale price
    £15.00
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    per 
    Out of stock
  • Presidium standard+duo probe, old (before oct 2020) models
    Regular price
    £79.00
    Sale price
    £79.00
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    Out of stock
  • Bottle of Isopropyl for cleaning stones
    Regular price
    £3.50
    Sale price
    £3.50
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    Out of stock
  • Cz (cubic zirconia).
    Regular price
    £6.00
    Sale price
    £6.00
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    Out of stock
  • Ari
    Regular price
    £1,110.00
    Sale price
    £1,110.00
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    per 
    Out of stock