Portable Gemstone Refractometer For Jewelry Identification. 1.30-1.81 RI Range, 0.01 Graduation. Includes Flashlight & Refractive Oil. Black, Easy To Use.(B)（Does not include the refractometer or immersion oil）

Portable Gemstone Refractometer For Jewelry Identification. 1.30-1.81 RI Range, 0.01 Graduation. Includes Flashlight & Refractive Oil. Black, Easy To Use.(B)（Does not include the refractometer or immersion oil）

• PRECISE RI MEASUREMENT: Identify gemstones accurately within the 1.30 to 1.81 range using this reliable Gem Refractometer for clear results
• PROFESSIONAL GEMSTONE ANALYSIS: Determine birefringence and for crystal type with these essential Gemstone Instruments for expert jewelry appraisal
• PORTABLE FIELD DESIGN: Carry this lightweight Detectors kit easily to any location for convenient on-site testing without bulk
• COMPLETE TESTING KIT: Includes refractive oil and flashlight to insure immediate operation for both beginners and professional jewelers
• LONG LASTING CONSTRUCTION: Built from sturdy materials to forestall wear and provide consistent performance for years of daily use