Gemax Gem Refractometer Dual

The GEMAX Gem Refractometer Dual is a professional-grade optical instrument designed for gemologists, jewelers, and gemstone enthusiasts. It is the first refractometer featuring a Dual LED light source (Yellow & White), enhancing accuracy in measuring Refractive Index (RI) and Birefringence of gemstones.

Key Features:

✔ Dual LED Light Source (Yellow & White) – Switchable for optimal readings
✔ Dual Scale (RI & Birefringence) – High precision (±0.002~0.003 RI)
✔ Hard Cube Zirconia Measuring Prism – Durable and scratch-resistant
✔ USB-C Powered or Battery-Operated – Includes 2x 23A 12V batteries & USB-C cable
✔ Includes Calibration Glass Cube & Polarizing Filter Lens – Ensures accurate calibration and birefringence analysis
✔ Portable, Lightweight & User-Friendly – Ideal for lab and field use

Unboxing and Components

Your GEMAX Gem Refractometer Dual package includes:

• Main refractometer unit
• Carry pouch/wallet
• USB-C cable & 2x 23A 12V batteries
• Calibration glass cube (testing stone)
• Polarizing filter lens (for birefringence analysis)
• User Manual

Technical Specifications

• Measurement Scale Range: 1.35 – 1.85 RI
• Accuracy: ±0.002~0.003 RI
• Light Source:
  • Dual LED System:
  • Yellow LED (589 nm): Sodium D-line equivalent (industry standard for precise RI measurements)
  • White LED (6000K): Daylight-balanced (enhances visibility for synthetic/high-birefringence stones)
• Power Options:
  • USB-C cable (included)
  • 2x 23A 12V batteries (included)
• Weight: 220g
• Dimensions: 130mm × 80mm × 52mm