One of the earliest standardized hardness scales is the nineteenth-century Mohs' scale, which is based on 10 benchmark minerals increasing in hardness from talc to diamond.
(One of the earliest standardized hardness scales; is; the nineteenth-century Mohs' scale) (the nineteenth-century Mohs' scale; is based; on 10 benchmark minerals) (10 benchmark minerals; increasing; in hardness from talc to diamond)
One of the earliest standardized hardness scales the nineteenth-century Mohs' scale 10 benchmark minerals
is is based increasing
the nineteenth-century Mohs' scale
on 10 benchmark minerals
in hardness from talc to diamond