Zak Jewelry Tools

GemOro® Pro-D Diamond Tester III

The engineers at GemOro® Superior Instruments have developed an enhanced version of their second generation PRO-D III simultaneous diamond and white sapphire tester.  The newest 3rd generation PRO-D III tester design is even sleeker and more ergonomic and has even better testing sensitivity than before.  Known for their accuracy and reliability, GemOro® sets the standard for protection against diamond simulant fraud! 

  • Sleek ergonomic shape comfortably rests in and on your hand when held.
  • Intuitive finger grip pads for increased user-friendliness and ease of use.
  • Precision retractable probe-tip with enhanced durability.
  • Durable ABS housing covered with GemOro’s exclusive rubberized paint that provides an even superior grip.
  • Fast warm-up time.
  • Glowing light pipe / probe tip cone / ring tone for quick stone identification  GREEN = Diamond, PINK = Sapphire, RED = Metal Alert.
  • Bright white LED stone illuminator light.
  • Powered by micro-USB or with its included 3 AAA rechargeable NiMH batteries (user may substitute 3 AAA alkaline batteries if desired).
  • Auto-off function if accidentally left on preserves battery life.
  • May be used with optional GemOro UltraDock III® battery charging stand accessory (Item #0772) and GemOro Test Stone Magnifier accessory.
  • Superior Surface Mount Technology (SMT).
  • Battery saving auto-off function.
  • Designed in the USA.
  • Two year probe tip warranty.
  • Lifetime Limited Replacement Warranty on the tester.
  • Includes NiMH rechargeable batteries, AC adapter/charger, loose stone holder, and compact rubberized portable storage case.