10 Best Gem Refractometer of September 2025

• Lightweight and compact, easy to carry.
• Low battery consumption for long service time.
• Identify single and double gems quickly and precisely.
• This refractometer features high accuracy and easy operation.
• Specially designed for measuring the refractive index of gemstones and solid materials.

Redxiao

• Specially designed: This refractometer is designed to measure the refractive index of gemstones and solid materials. Many people think that gem refractometers are the most important of all gem test instruments. The primary use of a refractometer is to measure the angle at which light is bent or refracted through a stone.
• High precision, compact and easy to carry: The refractometer is highly accurate and easy to operate. Lightweight and compact, it is easy to carry. It provides important gemstone recognition as it differs from gemstones to gemstones. The refractometer is also one of the few instruments that can provide you with information on opaque gems and transparent gems.
• High quality: low battery consumption and long service life. The possible gems continue to be eliminated by values ​​such as R.I., Color, Hardness and S.G. The transparent gemstone is tested and the surface is polished flat, which is very suitable for separating gemstones.
• Quick identification: Quickly and accurately identify single and double gems. Helps identify diamonds, moissanite and colored gems, speeds up the identification of gems in the package, does not require RI liquids, and results in uniform and reliable results each time, with a clearly visible display for easy reading measurements.
• Perfect after-sales service: We are committed to serving our customers wholeheartedly. Your feedback is the driving force for our improvement. We look forward to your comments. If you have any questions about our products, please feel free to contact us. We will do our best to meet your requirements and solve your problems quickly and efficiently.

Salmue

• Quality all metal construction
• Measurement range of 1.30 - 1.81
• Built-in LED light source with 3 x 1.5v batteries - included
• Considered by many to be the most important of all gem testing instruments
• Polarizing Filter, Hard and soft cases are included

Ade Advanced Optics

• Chelsea Filter - now used to identify mostly any gemstone
• Dichroscope - invaluable for distinguishing certain stones from similar gems.
• 10x triplet jewelers loupe in black housing-one of the most important gemstone identification tools.
• Quality Gemological Refractomer with 10 grams of Certified RI. 1.80 Liquid included.
• BONUS - GEMSTONES OF THE WORLD book by Walter Schumann.

Ade Advanced Optics

• ★Each gem has a typical refractive index due to its chemical composition and crystal structure.
• ★Refractive index is one of the most important optical parameters. Through these parameters, it can be judged whether the gemstone is anisotropic or isotropic.
• ★This digital gem refractometer is designed to accurately measure the refractive index of gems. It has a full range from 1.400 to 2.000 RI and can be used to test almost all kinds of gems.
• ★You don't need to use RI liquid, just put the sample on the test platform, it can be very fast, high accuracy, no refractometer oil, easy to read the results on the LCD, easy to use.
• ★The gem refractometer is the main and most powerful tool for gem identification. Therefore, it is widely used in jewelry stores, gem studios, museums and collections, auctions, laboratories, etc.

DYRABREST

• ✔Suitable for:Perfect for testing all of your gem stones. The product allows your refractometer to measure within the measuring range of 1.30 to 1.80 refractive index.
• ✔The refractive index fluid:It is gemologist tool for identifying refractive index.
• ✔Function:This liquid can also be used to reduce or eliminate glare from a gem's surface, facilitating inspection of the gem's interior for inclusions and other defects.
• ✔Contain:This GL-01 fluid is packed and will be supplied in an glass vial and contains 3ml of solution.
• ✔Guaranteed after sale:If there are any problems with the purchase, please feel free to contact us, we will help to fix the problem within 24 hours!

Clina

• ❤ WITH THE HELP OF CONTACT FLUID (RI FLUID) ❤ An optical contact between glass and gemstone is made. You can measure or test the refractive index of faceted stones, transparency or opacity, as well as their beauty, durability and scarcity.
• ❤ PROFESSIONAL FUNCTION ❤ Gemstone Refractometer is the most important and powerful tool for identifying and authenticating polished gemstones and semi-precious stones, as well as for observing the optical properties and structure of precious stones.
• ❤ USER-FRIENDLY DESIGN ❤ With integrated light source you can use it in different environments. Automatic Temperature Compensation (ATC) that adjusts to the climate. Low battery consumption for long operating times.
• ❤ PRODUCT DETAILS ❤ refractive index range between 1.30-1.81 RI, power supply is AA battery (not included). And size is 13 * 6 * 3.5cm / 5.1 * 2.4 * 1.4inch. Lightweight and compact, easy to transport.
• ❤ SATISFACTION GUARANTEE ❤ If you have any questions about the product, do not hesitate to contact us or ask questions in QA, Rotekt will solve your problem as soon as possible. 7 days money back guaranteed, Rotekt products are subject to strict quality inspections in the sales platform, there is no risk for you. Your satisfaction is our greatest wish!

Rotekt

• Each gem has a typical refractive index due to its chemical composition and crystal structure.
• Refractive index is one of the most important optical parameters. Through these parameters, it can be judged whether the gemstone is anisotropic or isotropic.
• This digital gem refractometer is designed to accurately measure the refractive index of gems. It has a full range from 1.400 to 2.000 RI and can be used to test almost all kinds of gems.
• You don't need to use RI liquid, just put the sample on the test platform, it can be very fast, high accuracy, no refractometer oil, easy to read the results on the LCD, easy to use.
• The gem refractometer is the main and most powerful tool for gem identification. Therefore, it is widely used in jewelry stores, gem studios, museums and collections, auctions, laboratories, etc.

DYRABREST

• High quality: Quickly and accurately identify single and double gems. Low battery consumption and long life. Made of high quality ABS material, sturdy structure and long service life.
• High precision and easy operation: The refractometer is highly accurate and easy to operate. Cost-effective, easy to operate without mistakes, is a stable diamond measuring instrument.
• Specially designed: Designed to measure the refractive index of gemstones and solid materials. Let you measure more accurately. Set design, more economical and cost-effective, save costs for your jewelry making work.
• Low cost and high return: This gem refractometer is a low-cost, lightweight measuring instrument used by jewelers and gem traders to measure polished gemstones with a refractive index ranging from 1.30 to 1.81 RI.
• Compact and easy to carry: The RHG-181 gem refractometer is specially used to measure the refractive index of gems and solid materials. The size is about 13 * 6 * 3.5 cm/5.1 * 2.4 * 1.4 inches. It is characterized by its compactness and lightness, and is very popular in the jewelry industry.

Clina

• 【Product Parameters】--- Model: DGR-501; Color: silver; Material: aluminum alloy; Power supply: 1 9V multilayer built-in battery (not included); Working temperature: 5~30°C; Measuring range: 1.400～2.000 RI; Product size: about 105 x 60 x 35 mm.
• 【Refractive Index】--- Refractive index is one of the most important optical parameters. Through these parameters, it can be judged whether the gemstone is anisotropic or isotropic.
• 【Accurate Measurement】--- This digital gem refractometer is designed to accurately measure the refractive index of gems. It has a full range from 1.400 to 2.000 RI and can be used to test almost all kinds of gems.
• 【Easy To Operate】--- You don't need to use RI liquid, just put the sample on the test platform, it can be very fast, high accuracy, no refractometer oil, easy to read the results on the LCD, easy to use.
• 【Wide Application】--- The gem refractometer is the main and most powerful tool for gem identification. Therefore, it is widely used in jewelry stores, gem studios, museums and collections, auctions, laboratories, etc.

CNCEST