Precision testing kit: This hardness tester is crafted from high-quality crystal, ensuring precise and accurate readings for mineral identification. It includes 9 hardness pens featuring unique mineral tips to guarantee reliable testing results. Comprehensive hardness grades: The kit covers a range of hardness grades to effectively assess the hardness of various materials. It includes mineral-inlaid metal rods suitable for evaluating gems, ceramics, glass, minerals, concrete, and more. Non-destructive assessment: Utilize the non-invasive method for visual estimation with this hardness test kit. Assess gemstone hardness without damage by examining the smoothness of facets and sharpness of edges under magnification. Exceptional quality and design: This test kit features meticulous machining and a multi-faceted shape, enhancing usability and durability. Its sleek design serves practical purposes while adding sophistication to your toolkit. Service: We place great emphasis on our customers' shopping experience. If you have any questions, please feel free to contact us; we will respond to you within 24 hours!