Service:We attach great importance to our customers' shopping experience. If you have any questions, please feel free to contact us, we will reply you as soon as possible within 24 hours Premium Crystal Accuracy: Constructed from high-quality crystal, this hardness tester ensures precise and reliable readings. Comprehensive Test Grades: Covering grades from 5 to 9, the tester is equipped with mineral-infused rods, perfect for assessing the hardness of gemstones, ceramic tiles,and more. Indirect Visual Estimation Method: A magnifying glass allows observation of gemstones showcasing varying degrees of hardness, characterized by smooth surfaces and sharp edges. Excellent Quality: The hardness tester is meticulously designed with a multi-faceted shape, ensuring durability and ease of use. Its portable design makes it suitable for various applications.