abrasive
something that’s hard like sandpaper
rock conglomerate
sedimentary rock
ore
used for something precious/something with value
crystal shape and cleavage are determined mainly by the mineral’s:
composition and atomic arrangement
some properties of diamond are different from these of graphite because diamond:
has a different arrangement of atoms
color in its powdered form
streak
a rock can be scratched by
something that’s harder than it
a rock can scratch -
something not as hard