Mineral Example Scratch Test Check out the Mineral Gallery 1 Talc Easily scratch with fingernail 2 Gypsum Barely scratch with fingernail 3 Calcite Barely scratch with copper penny The resistance that a smooth surface of a mineral offers to scratching is its hardness.
(Gypsum; Barely scratch; with fingernail 3 Calcite) (the Mineral Gallery 1 Talc Easily scratch with fingernail 2; Barely scratch; ) (The resistance; offers; to scratching) (the Mineral Gallery 1 Talc Easily scratch with fingernail 2 Gypsum Barely scratch with fingernail 3 Calcite Barely scratch with copper penny; is; its hardness) (Test Check; [is] Scratch [of]; Mineral Example)
Gypsum the Mineral Gallery 1 Talc Easily scratch with fingernail 2 The resistance the Mineral Gallery 1 Talc Easily scratch with fingernail 2 Gypsum Barely scratch with fingernail 3 Calcite Barely scratch with copper penny Test Check
Barely scratch Barely scratch offers is [is] Scratch [of]
with fingernail 3 Calcite
to scratching
its hardness
Mineral Example