How accurate is Presidium Gem Tester?

The presidium gem tester is not considered to be very accurate. You don’t see serious gemologist using them. If I was to own just one tool it would be a refractometer.

Can fake diamonds pass diamond tester?

What do the Test Results Mean? A diamond tester will only test positive for diamond and moissanite. Synthetic moissanite has been used as a gemstone only since the 1990s, so if your piece is from an earlier era, it’s definitely a diamond if it passes this test!

Are diamond testers legit?

How Reliable Are Diamond Testers? Diamond testers are one of the most accurate tools to check a diamond for authenticity. However, you should know that testers that rely on thermal conductivity can mistake a moissanite for a diamond because these two stones are very similar in the way they conduct heat.

Is the Presidium diamondmate a good diamond tester?

Customer Review: The Presidium Gem Testers are a great tool for the Reseller. There was a problem filtering reviews right now. Please try again later. I would give this 5 stars if it could distinguish between diamond and Moissanite.

How does a Presidium stone 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. The Presidium Gem Tester / Color Stone EstimatorIs made under rigid quality standards.

Which is the best diamond Tester on the market?

Sadly, most testers don’t meet the basic qualifications of a good gem tester: ease, reliability, and speed. Luckily, the Presidium DiamondMate-C Electronic Diamond Tester meets and exceeds these qualifications.Easy visual lights and audible beeps indicate results in a way that’s simple enough for anyone to understand.

What does Presidium do for the diamond industry?

As the first company in the world to launch numerous gemological instruments, Presidium is committed to research and developing innovative instruments for the benefit of the industry. is the world’s leading manufacturer of gemmological instruments that test and measure diamonds and gems, for the diamond and gemstones industries.