A spiral of 98 minerals and gems in order from softest to hardest according to Mohs scale. The baseline minerals that Friedrich Mohs chose in 1812 for each hardness number are highlighted with a colored circle for reference, with diamond, the hardest of all, in the very center.

Designed as both a teaching resource and a piece of art, this colorful poster is ideal for students, educators, collectors, and anyone fascinated by the beauty of the natural world. Whether you're deep into geology or mineralogy or just love to look at crystals, this taxonomy chart makes a great reference guide for the planet's most captivating stones.



Printed on thick, museum-quality matte paper for lasting color and clarity.