Rock salt and rock gypsum are predominately the minerals halite and gypsum respectively. Quartzite is also predominately the mineral quartz.
a diamond is a mineral (also is a gem)
Sapphire is gem quality corundum, which is a mineral.
mineral
Mineral
Chromium is not a rock, but rather a mineral. It is also a chemical element that is metallic and shiny.
the mineral is clay and there is no rock
It is a mineral or a number of minerals which are part of the composition of rock.
A mineral is a rock, so yes.
Magnetite is classified as a mineral, not a rock.
Magnetite is classified as a mineral, not a rock.
Cobalt is a mineral, not a rock.
is a mineral