Professional 10x 18mm Darkfield LED Loupe Polariscope Handheld Gem Tester with Flashlight for Jewel ADVANCED OPTICS SYSTEM: This professional-grade tool features a 10x 18mm darkfield loupe with precision optics, perfect for detailed gemstone analysis. The high-quality lens provides clear, magnified views, making it an essential device for gemologists and jewelers alike. BUILT-IN LED LIGHT: Equipped with an AC-powered LED light, this loupe offers consistent and powerful illumination. The bright, focused light enhances visibility and detail, making it ideal for both laboratory and retail environments where accurate gem assessment is crucial. GEMSTONE REFRACTIVITY TESTING: Utilize this tool to accurately distinguish between isotropic and anisotropic gems. This capability is vital for reliable gem identification, helping professionals confirm the authenticity and quality of precious stones with precision. STRAIN DETECTION FUNCTION: The loupe's ability to reveal internal stress in diamonds and other gemstones is invaluable for differentiating between natural and synthetic materials. This feature assists in ensuring the integrity and value of the gems being examined. CONOSCOPE CAPABILITY: This feature enables the observation of light travel within gemstones, enhancing optical characterization and pattern analysis. It's an essential function for advanced gemological research, providing into the internal structure of gemstones. Power Supply: 2 * AA batteries (Not included batteries) Color: Black Material: Aluminium Package Contents: 1 * Flashlight 1 * Darkfield LED Loupe Polariscope Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.