Mohs scale of relative hardness consists of 10 minerals, each scratching all those below it in scale and being scratched by all those above it: talc gypsum calcite fluorite apatite orthoclase quartz topaz corundum diamond head - Difference in elevation between intake and discharge points for a liquid .
(Mohs scale of relative hardness; consists; of 10 minerals) (each; scratching; all those below it)
Mohs scale of relative hardness each
consists scratching
of 10 minerals
all those below it