<<<< Back to Moissanite Terminator II

MT2 Moissanite terminator is used to identify artificial Moissanite gemstones and other man made synthetic gemstones. No other instrument or tester is required to identify Moissanite gemstones.


1. Turn unit on with adjustment knob to the right (Large Stone Setting)

2. Remove the protective end cap

3. With your thumb push on the button marked PRESS and HOLD, while your fingers touch the rear metal plate.

4. The YELLOW testing light should light and must stay on during all tests.

5. With your other hand, hold the metal part of the ring or any solid metal part containing the gemstone. When using the loose stone holder our other hand must hold the loose stone holder.

6. Place the tester probe in the center of the gemstone to be tested without touching the tester probe to any metal surface. Do this in a manor that the metal part of the testing probe is as far away as possible from any metal findings or gem holding device, because Moissanite gem stones are inconsistent, for BEST results be sure to touch 3 or 4 points around the center of the gem stone.

7. If a Moissanite gemstone is being tested you will hear a discontinuous BEEP and see a flashing GREEN light.

8. Real gemstones will not indicate when using the MT2 tester. In order to identify natural Diamonds a thermal Diamond tester such as the R S Mizar “Prestige series II” must be used.

9. Use the small stone setting only when testing small stones, approximately 3.5mm or smaller, or then you cannot keep the probe a tenth of an inch from the metal prongs or surface.

NOTE: To test un-mounted stone, place the stone in loose stone holder. Always hold the loose stone holder with your free hand.


  • Always make sure that the gemstone to be tested is dry and clean
  • The only error which can be made is getting to close to the metal surface. When this happens a small blue glow can usually be observed from the probe to the metal. If this happens a Moissanite indication will be seen & heard. Keep the probe away from the metal surface
  • It is best to test in a circular motion around the center of the gemstone. Several points on the stone should always be checked.
  • The YELLOW testing light must remain on during all testing. If it does not the battery need to be replace with a 9volt type NEDA size 1604 (006P).
  • To identify Moissanite gemstones and other man made Simulants only the “MT2” tester is required.
  • No indication will be seen or heard when using the “MT2” tester on any natural gemstones.

  • A function test can be done, by simply touching your free hand to the tester probe. Moissanite will be indicated.


Oris Nelson Enterprise, Inc. provides that each Moissanite Tester will be free from defects in material and workmanship for a period of one (1) year from date of purchase. (Batteries are not included in Warranty) This warranty becomes void by:

  • Unauthorized repair, misuse, modification, and alteration, tampering or breaking any factory seal.
  • Accidental damage, neglect or improper use

Oris Nelson Enterprise, Inc. shall not be held legally liable or responsible for any error in display indication or the interpretation thereof in the identification of any stones, minerals, gems or gemstones by the Diamond Detective.


Should this tester require Warranty Service you must call or write O.N.E. for a return material authorization (R.M.A.) before returning it for repair. A copy of the original sale receipt must accompany all returns. Any returns without the R.M.A. number on the outside of the package will not be accepted and will be returned to sender.

<<<< Back to Moissanite Terminator II