Gemstone Refractometer Jewelry Tester with LCD Screen, Refractive Index 1.300-3.000 for Gold, Silver, and Diamond Identification

The Gemstone Refractometer is an essential jewelry testing tool featuring a large LCD backlight for easy visibility. With an impressive accuracy of +/- 0.001 and a refractive index range of 1.300-3.000, it allows for precise identification of various gemstones, including jade, Hetian jade, and diamonds. This refractometer is ideal for evaluating polished finished products. For jade, it verifies if the refractive index meets the expected value of 1.66, requiring a flat rough stone of at least 3mm. For Hetian jade, the instrument checks if the refractive index aligns with the numerical value of 1.61. It is also effective for testing the refractive characteristics of numerous gemstones, ensuring the rough stone corresponds with its identified type. When evaluating diamonds, it distinguishes between natural and artificial varieties based on their refractive index, with natural diamonds reaching 2.417 and readings between 1.98-2.2 suggesting artificial origins. Specifications: - Measuring range: refractive index 1.300-3.000 - Measurement error: +/- 0.005 - Measurement accuracy: 0.001 - Battery life: 10,000 tests - Power supply: 700mA lithium battery - Product Size: 13.5x7.8x2.4cm (5.31x3.1x0.94 inches) - Net weight: 0.8kg (1.76lbs) Included in the package: - 1 Gemstone refractometer - 2 calibration blocks (1 at 1.487, 1 at 1.806) - 1 aluminum box - 1 instruction manual For any inquiries about our products, please contact us, and we will respond within 24 hours.

• Jewelry Tester Identification Tool: This advanced gemstone refractometer features high-sensitivity sensors and an LCD display for non-destructive, rapid, and precise measurement of gemstones' refractive index values. With a measuring range of 1.300 to 3.000 and an accuracy of up to 0.001, it ensures reliable performance with a measurement error of just ±0.005.
• Test Method: Measuring gemstones is simple and efficient—no refractive oil is needed. Place the measuring surfaces of your sample close to the platform for accurate assessment. This method aids in distinguishing between uniaxial and biaxial crystals. The device also comes with calibration blocks of 1.487 and 1.806 for accurate pre-measurement calibration.
• High-Quality Materials: Crafted from durable hard aluminum alloy, the work surface of the gem refractometer is scratch-resistant and robust, providing a stable base for precise testing. It also features an ABS engineering plastic power switch and is equipped with triple insulation protection to minimize the risk of electrical leakage.
• Wide Applications: This gemstone identification tester is perfect for quickly and accurately identifying both single and double gemstones, including moissanite, diamonds, colored gemstones, and crystals. It is designed specifically for measuring the refractive index of gemstones and solid materials and is widely used in gem and jewelry stores.
• Working Principle: The refractometer operates on the principle of total internal reflection, which is crucial for determining the refractive index—an essential optical parameter. This tool not only facilitates precise gemstone measurement but is also invaluable for identifying different gem types.