Mohs Hardness Scale illustrating mineral hardness levels from 1 to 10, with corresponding minerals and common objects for comparison.
Mohs Hardness Scale chart showing mineral hardness from 1 to 10, with examples like talc, gypsum, calcite, fluorite, apatite, orthoclase, quartz, topaz, corundum, and diamond, alongside common objects such as fingernail, copper penny, knife, steel nail, and masonry drill bit.