Scale of Hardness Collection
Product Number: SB14255
No longer avaliable
This item has been discontinued
Sorry, this product is no longer available. This collection is the traditional Mohs’ scale, which assigned a “hardness” to 10 key minerals with talc No. 1 (the softest) and diamond No. 10 (the hardest). The first nine minerals are included in this set. The 1 specimens are numbered in a compartmentalized container.