2 Hardness of minerals is related to Moh's scale of 1 to 10 using typical minerals as standards: (1) Talc: easily scratched by the fingernail.
(2 Hardness of minerals; is related; to Moh's scale of 1 to 10) (typical minerals as standards; easily scratched; by the fingernail)
2 Hardness of minerals typical minerals as standards
is related easily scratched
to Moh's scale of 1 to 10
by the fingernail