Scratch Resistance MOHS Rating (Method Of Hardness Scale)

Scratch resistance of glazes is measured by scatching the glaze with a mineral of known hardness. Hardness of minerals is classified by MOH’s Scale which lists 10 minerals according to their hardness. The higher the number the harder the glaze.

The scale is as follows:

1 - Talc 2 - Gypsum 3 - Calcite 4 - Flourite 5 -Apatite

6 - Microline 7 - Quartz 8 - Topaz 9 - Corundum 10 - Diamond