The sclerometer (from the Greek skleros meaning "hard") is a mineralogist's (usually) instrument used to measure the hardness of materials.

The instrument is designed to determine the degree of hardness of a given mineral by applying pressure on a moving diamond point until a "scratch" has occurred.

Methods of hardness testing:

• Turner's Sclerometer
• Shore's Scleroscope
• Brinell's Test
• Keep's Test

External links

• Testing the Hardness of Metals