The Moh's Hardness Scale collection is mounted on a 5.5" X 7 1/8" full color card stock which holds 9 specimens in their order from the softest to the hardest.
There are indicators on the card which instruct the students what will affect the surface of each of these specimens. The card is packaged in a resalable zip lock bag. Grade Level 6-12. Ages 11-18.