Rock Hound
Rock Hound
Rock Hound
Home
Moh
Ages
ID Rocks
Florida
Links
Cleavage
Moh's hardness scale

Moh’s Scale of hardness

Common material

10

Diamond

9

Corundum

8

Topaz

7

Quartz

6

Orthoclase

5.5

Glass, masonry nail

5

Apatite

4.5

Wire nail

4

Fluorite

3.5

Copper penny

3

Calcite

2.5

Fingernail

2

Gypsum

1

Talc


A Mnemonic,

The first letter of each word is the first letter of the Moh's Hardness Scale

Talc Gypsum Calcite Fluorite Apatite Orthoclase Quartz Topaz Corumdum Diamond (Hardness scale 1-10 for minerals)