The Best CVD/HPHT Diamond Testers by Gemlogis

Differentiate diamond types in seconds with our testing machines.

It has become more challenging for gemologists and jewelers to identify natural diamonds from synthetic stones without a specialized CVD/HPHT diamond tester, as lab-grown diamonds are widely available and are near indistinguishable from earth-mined diamonds, yet their prices vary a lot.

Over the past decade, Gemlogis has dominated the CVD diamond tester industry and developed the most trusted, accurate, easy-to-operate and portable CVD diamond tester machines with all the innovative features and patented technology you/ll need. As a result, our CVD diamond testing machines enable gemologists to differentiate diamond types instantly, confidently and conveniently.

Gemlogis CVD/HPHT testers

Looking for a reliable, accurate and convenient CVD tester?
Let’s see all the brilliant features of the best CVD diamond testers available from Gemlogis!

BELIZE

For Testing:

Natural Diamond, CVD, HPHT, Type IIa
Moissanite, Simulants
Loose + Mounted (Open or Close back)

VISTA

For Testing:

Natural Diamond, CVD, HPHT, Type IIa
Loose + Mounted (Open or Close back)

VISTA PRO

For Testing:

Natural Diamond, CVD, HPHT, Type IIa
Loose + Mounted (Open or Close back)
Bulky jewelry

The 8 smart features of our CVD diamond testing machines

1. MOST COMPACT & ACCURATE

BELIZE CVD Tester combines thermal and optical probe tips into a single instrument to facilitate the verifying procedure and convenience. Both VISTA and VISTA PRO CVD/HPHT testers have all-in-one features that help users to separate natural diamonds from lab-grown diamonds instantly without any delay, and no extra tool is needed.

3. INSTANT RESULTS WITH CLEAR

Each CVD diamond testing machine has LED indicators to show different results clearly. No complicated data is needed to be analyzed with the CVD Tester. BELIZE also features music tone to indicate the diagnostic results which can be switched on or off depending on the user preferences of the CVD diamond tester machine.

2. NATURAL VS LAB-GROWN DIAMONDS

VISTA/VISTA PRO CVD Tester distinguishes earth-mined diamonds from HPHT treated/lab created (CVD) diamonds, while BELIZE can perform quick identification between earth-mined diamonds, Type IIa/HPHT/CVD diamonds, simulants and moissanite (including F1 Moissanite). These CVD diamond testers are able to test colorless to near colorless gemstones (D-J).

4. PORTABLE & LIGHTWEIGHT

Gemlogis has always been devoted to design every CVD diamond tester machine with the most portable and compact characteristics, letting users carry our CVD diamond testers anywhere. Weight: BELIZE 105g; VISTA 300g; VISTA PRO 940G.

5. FOR ALL KINDS OF LOOSE & MOUNTED STONES

6. PATENTED TECHNOLOGY

All the Gemlogis CVD Testers combine patented technology and top-notch quality to ensure gemologists can screen with convenience and accuracy. BELIZE is also the industry's first twin probe tip CVD/HPHT tester. As the best CVD diamond testers in the industry, both BELIZE and VISTA are certified by ASSURE.

7. LONG LASTING BATTERIES

Every Gemlogis HPHT diamond tester has a built-in rechargeable lithium battery which offers 3-5 nonstop usage hours, making them the go-to choice of CVD/HPHT tester for jewelers and industry professional from around the world.

8. CONVENIENT & MOST AFFORDABLE

Gemlogis always aims to offer the industry the best CVD diamond testers that are most compact, detail-oriented, yet powerful and affordable. Therefore, every Gemlogis CVD diamond testing machine package comes with a universal charger. The BELIZE CVD/HPHT tester also includes UV protective glasses as well.

Specifications of our CVD diamond tester machines

BELIZE

Technical Specs:

Testing Range: 0.02ct+
Color Range: Colorless to near colorless (D - J)
Dimensions (mm): 182 x 47 x 24
Weight (g): 105
Battery Life (Hrs): 3hrs non-stop. 720hrs standby.

Warranty: Factory 12 months

VISTA

Technical Specs:

Testing Range: 0.01ct ~ 12ct
Color Range: Colorless (D-J)
Dimensions (mm): 98L x 41W x 110H
Weight (g): 300g
Battery Life (Hrs): 5hrs non-stop, 720hrs standby
Warranty: Factory 12 months

VISTA PRO

Technical Specs:

Testing Range: 0.01ct ~ 12ct
Color Range: Colorless (D-J)
Dimensions (mm): 204H x 121W
Weight (g): 940g
Battery Life (Hrs): 5hrs non-stop, 720hrs standby
Warranty: Factory 12 months

More about Gemlogis CVD testers - FAQs:

Why I am getting inconsistent results?

Gemlogis testers require a certain level of user experience to handle properly: Make sure to clean the probe tip and remove oxidation Make sure to clean the surface of the gemstone to remove any grease and dirt Make sure the gemstones are at room temperature (remove from body/pocket to let it cool down) Make sure to point the probe tip at a perpendicular angle against a flat surface of the gemstone Make sure to allow the gemstone to cool down between consecutive tests Make sure to test different spots on the surface of the stones, due to the impurities on the stones, it may affect the results.
Why does moissanite indicate as diamond on some occasions?

In some instances there may be a disproportional allocation of silicon carbide located on a moissanite; therefore, performing several tests on different spots (including the girdle) of the gemstone is recommended.
Can Gemlogis thermal testers detect uncut raw/uncut stone?

Yes, as long as the stone has a clean & flat surface.
Will the size of the gemstone affect the test result?

Yes. Smaller stones conduct less heat from the probe tip. Hence, the reading indicated may be slightly lower.
Why do blue diamond & black diamond indicate as moissanite or metal?

Blue Diamond is a semiconductor due to the substitution of boron impurities in place of carbon atoms. Black Diamond is substituted with graphite or iron inclusions. Both blue and black diamond will indicate as moissanite or metal on the tester.
Why do I sometimes hear intermittent beeping when testing gemstones?

Whenever the probe tip touches a metal surface, an intermittent beep will sound. This is only applicable to mounted gemstones.