(Alexandrite is a variety of chrysoberyl). These imitations are nowhere near as valuable as either natural or synthetic alexandrite. Some vendors may even sell these imitation gems as “synthetic alexandrites.” (After all, a synthetic alexandrite will still fetch more than a synthetic corundum or a zandrite).

How does Presidium Gem Tester work?

Simply touch the Gem Tester’s sophisticated thermoelectric probe to the surface of any Mounted or Loose stone and the specially calibrated dial will show you the relative heat conductivity of the material. Stones as small as 1mm can be tested.

How can you tell the difference between genuine alexandrite and synthetic alexandrite?

NATURAL ALEXANDRITE: Natural Alexandrite displays color change that may range from the lightest of light purple to grassy dark green, reddish hues, and deep blues depending on the stone. SYNTHETIC ALEXANDRITE:Synthetic alexandrite features the same color change phenomenon as natural alexandrite.

What is Chatham alexandrite?

Lab grown Chatham Alexandrite is an emerald by day, ruby by night. Alexandrite’s are a rare variety of the mineral chrysoberyl that changes color from bluish-green in daylight to purplish-red in incandescent light.

Can you fake a diamond tester?

ABSOLUTELY! You can have a stone that’s not a diamond beep just like a diamond. In fact, a lot of jewelry stores and customers in the last ten years have probably bought diamonds that weren’t real, and never knew it! Likewise, you can test a genuine diamond in a ring, and have it buzz like it’s not a real stone.

Can cubic zirconia pass a diamond tester?

Yes, some diamond simulants can pass a diamond tester. For example, moissanite, a man made gem, may pass as a diamond on a standard tester pen. This is because moissanite also has very high thermal conductivity! Other diamond simulants, such as CZ, will not pass the tester.

Which is the best gem tester?

  • DigiWeigh Diamond Testing Kit. BEST TESTING KIT.
  • Presidium Portable Diamond Tester. BEST PORTABLE.
  • RS Mizar Moissanite Tester. BEST FOR DETECTING FAKES.
  • GemOro Diamond Tester. PROFESSIONAL PICK.
  • Presidium Gem Tester. BEST FOR GEMS.