Definitions for "Moh's Scale"
A scale developed in the nineteenth century to test the hardness of minerals, and contains a series of minerals ranging in hardness from 1 (talc) to 10 (diamond). The mineral in the scale is drawn across the test piece to determine which mineral is sufficiently hard enough to mark the ceramic, thus measuring scratch hardness.
The 10-point scale of mineral hardness. Diamond scores 10 on Mohs Scale. The diamond is the hardest of all known natural substances.
comparative scale of hardness from 1, the softest, to 10, the hardest (diamond). Most gemstones fall in the range 7-10