Features: Professional testing tool crafted from high precise metal ensures reliabled diamantine observation and accurate identification, outperforming traditional plastic alternatives with enhanced durability and measurement consistency. Featuring a corrosions resistant metal construction and streamlined interfaces, this portable device combines laboratory performances for efficient on site or mobile analysis. Ideal for gemologists, traveling jewelry merchants, and serious collectors requiring dependable tools for frequent verification in dynamic environments. Perfectly suited for laboratory examinations, trade show appraisals, or fieldwork scenarios where precise instruments must withstand rigorous daily use and transportation. Versatile functionality extends beyond diamantine grading to include multiple stones, making it an essential multi verification tool for professional and enthusiasts handling diverse collections. Specifications: Component: metal Size:Approx.6.6x3.2cm/2.6x1.26inch Color:Blue/Red/Silver Technical parameters: High-precise sensors | Professional- optically lens | Fast response time Usage scenarios: jewelry store | laboratory | collection appraisal Package Includes: 1pcs Testing Tool note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.