Description
Gemlogis Belize Pro is a professional diamond and moissanite tester featuring patented twin-probe technology. It combines thermal and optical measurement in a single device and, in just two steps, reliably determines whether a stone is an earth-mined diamond, a laboratory-grown diamond (CVD, HPHT, Type IIa), Moissanite, or a simulant. It works with stones from 0.02 ct in the D–J color range and VVS1–SI2 clarity.
A key advantage over older models is its improved detection of earth-mined diamonds with low UV sensitivity. These are precisely the stones that conventional testers can misidentify as Moissanite — with the Belize Pro, that does not happen.
Two Testing Modes
Default mode (thermal + optical): The device first checks the stone’s thermal conductivity. If it is a simulant, the result is displayed immediately and the test ends. If the stone exhibits the properties of a diamond or Moissanite, the device prompts the user for a second step — the optical test. The result falls into one of four categories: earth-mined diamond, laboratory-grown diamond (CVD / HPHT / Type IIa), Moissanite (including F1), or simulant.
Q-Mode (quick optical test): A one-step shortened mode for situations when a larger batch of stones needs to be screened quickly. Ideal for preliminary sorting where the thermal step has already been performed or is not required.
Key Features
• Twin-probe (thermal + optical): two independent measurement methods in one device
• Distinguishes 5 categories: earth-mined diamond / laboratory-grown diamond (HPHT, CVD) / Type IIa diamond / Moissanite incl. F1 / simulant
• Improved detection of earth-mined diamonds with low UV sensitivity
• Two testing modes: default (thermal + optical) and Q-Mode (quick optical test)
• Large OLED display, audible signal (can be turned off)
• UV light activates only when the probe contacts the stone — safe even during prolonged use
• Tests stones from 0.02 ct — suitable for melee
• Tests loose and mounted stones — rings, pendants, earrings with open or closed settings
• Color range D–J, clarity VVS1–SI2
• Power-saving mode and automatic shutoff
• Ergonomic shape, suitable for both left- and right-handed users
• Power: 3× AAA or USB; 12-month warranty
Limitations
The Belize Pro is a screening device — its results are indicative and do not replace a full gemological laboratory. The device works with stones in the D–J color and VVS1–SI2 clarity range. Extended identification of colored simulants (up to 29 types) requires the Gemlogis ASTRO accessory.
What’s in the Box
• 1× Gemlogis Belize Pro tester
• 1× metal stone stand
• 1× adapter (USB power)
• 1× UV protective glasses
• 1× neck lanyard
• 1× user manual
About the Brand
Gemlogis is a manufacturer of gemological screening instruments headquartered with its R&D center in Singapore. The company develops and produces its own instruments under its own brand and holds ISO 9001, ISO 14001, ISO 13485, and TS 16949 industry certifications. It specializes in portable diamond testers and segregators, and its key technological contribution is the patented twin-probe technology, which combines thermal and optical measurement in a single device. Gemlogis products have undergone testing as part of the Natural Diamond Council’s ASSURE program — an independent benchmarking protocol for diamond verification instruments.
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