With a hardness of 5, Apatite can scratch a penny but not glass. Thank you for giving as all proceeds go to help funds our scholarships, and any amount helps!
Quartz has a hardness of 7 and is one of the most durable minerals. Thanks for being a durable donor!
Topaz is the hardest silicate mineral and is orthorhombic. Thank you for helping our students crystallize their knowledge of Earth!
Corundum has a hardness of 9, and includes rubies and sapphires. Thank you for being a gem!
Diamonds are at the top of the Mohs scale with a hardness of 10. Thank you for helping our students reach their full, cut and polished potential!