Dinosaurs Rock Mineral Collection and ID Chart, 9 Real Specimen Mohs Hardness Scale Rock

Includes 9 genuine rocks/minerals/gemstones that are one through nine on the Mohs Hardness Scale. The Mohs scale of mineral hardness characterizes the scratch resistance of various minerals through the ability of a harder material to scratch a softer material. It was created in 1812 by the German geologist and mineralogist Friedrich Mohs and is one of several definitions of hardness in materials science.

Dinosaurs Rock Mineral Collection and ID Chart, 9 Real Specimen Mohs Hardness Scale Rock Includes 9 genuine rocks, minerals, and gemstones representing each level of the Mohs Hardness Scale from one to nine The collection features real specimens that allow for hands-on learning and exploration of mineral hardness Ideal for educational purposes, geology enthusiasts, and collectors Each specimen is labeled for easy identification and understanding of its hardness level Perfect for classrooms, science projects, or as a unique gift for geology lovers