Gem Master Refractive Index Fluid 1.81 is a professional optical contact liquid formulated for use with classical gemological refractometers. With a refractive index of nD 1.81, it supports accurate RI measurements and is particularly useful when testing gemstones with higher refractive indices, including many garnets. Its advanced formulation offers reduced crystallization compared with 1.79 RI fluids, including at lower temperatures, helping provide reliable long-term performance. The fluid is supplied in a practical bottle designed to help minimize spills during use. Ideal for professional gemologists, jewellers, gemstone dealers, laboratories and gemmology students. Key Features Refractive Index: nD 1.81 Professional contact liquid for gemological refractometers Suitable for gemstones with higher refractive indices Particularly useful for testing garnets Helps ensure accurate refractive index measurements Reduced crystallization compared with 1.79 RI fluids Formulated for good stability and long service life Bottle designed to help minimize accidental spills Volume: 5 ml Suitable for professional and educational gemmology Specifications Brand: Gem Master Product: Refractometer Contact Liquid Refractive Index: nD 1.81 Volume: 5 ml Application: Gemstone refractive index measurement Suitable Equipment: Classical gemological refractometers Form: Optical contact liquid Important Information Refractometer contact liquids are chemical products and must be handled according to the manufacturer's safety instructions. Avoid skin contact and inhalation of vapours, use in a well-ventilated area, keep the container securely closed after use and consult the supplied safety information before handling.
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