Specification Brand : Jeorywoet BulletPoint1 : Our Jewelry Refractometer ismade of plastic material which is for long term use and it can provide a longer service life and a lower replacement frequency BulletPoint2 : This Compact Refractometer will be your primary and most powerful tool in gemstone identification BulletPoint3 : With this Refractometer, you can identify singly & doubly gemstones quickly and accurately BulletPoint4 : The Portable Refractometer is a low cost, lightweight measuring instrument but with high wccuracy BulletPoint5 : The Gemmology Refractometer has been uniquely designed for a low battery consumption and easty to carry with to anywhere you like Color : Black ExternallyAssignedProductIdentifier : 7439884932245 ItemLength : 6.69 inches ItemName : Gemmology Refractometer CL-181 Compact Lightweight Portable with Refractive Fluid Oil for Jewelry Measuring Refractometer ItemPackageDimensions_Height : 3 centimeters ItemPackageDimensions_Length : 7 centimeters ItemPackageDimensions_Width : 13 centimeters ItemTypeKeyword : science-lab-refractometers Manufacturer : Jeorywoet ModelName : Buachoisoapn21w37g ModelNumber : Vitdipy4v6nuqrsxp NumberOfItems : 1 PartNumber : 3I240823DDXUUVC55US ProductDescription : Description Refractive Index is one of the most important optical parameters used to identify and authenticate polished precious and semi-precious gemstones. Our item is a low cost, lightweight measuring instrument but with high wccuracy. This Compact Refractometer will be your primary and most powerful tool in gemstone identification. Features refractometer -Color: Black. -Material: Plastic. -Size: 30x70x130 mm/1.18x2.76x5.12 inch. Weight: 400g Measuring Range: 1.30 – 1.81 RI Minimum Graduation Value: 0.01 RI Note: 1. 1 inch=2.54cm/1cm≈0.393inch. 2. Please allow 1-3 cm error due to manual measurement. Pls make sure you do not mind this. Package Including 1 * Refractometer1 * Polarizing Filter1 * Monochromatic Light Filter1 * Mini Flashlight1 * 1ml Refractive Index Fluid Oil1 * 1.5V AAA Battery1 * Storage Box1 * Refractometer Index Reference List(for 77 common gemstones, i.e. Calcite, Jadeite, Quartz etc.)1 * Quick Start Guide ProductSiteLaunchDate : 2024-08-23T06:49:19.651Z Size : DLX‑SDJ1514)0‑55%)1.333‑1.430 UnitCount : 1 UnspscCode : 43220000