Number of Kits Available: 7

These sets contain one mineral each demonstrating hardnesses 1 through 9 of the Moh's Hardness Scale, as well as a penny, a nail, a glass plate, and a streak plate. The sets are smaller (but with the same materials) than the Geomodules hardness sets.

15 Hardness test packets are also available for loan. Each packet includes a penny, a nail, a glass plate, and a streak plate. No minerals are included.