Gravel
this is the meaning . a make up of the largest and most important class of rock formind
Ohio's most important resources are fertile soils, and valuable mineral deposits such as coal, oil, natural gas, and rock salts.
Carbonates are the second most important mineral group.
Pennsylvania's most important mineral is coal. Second is oil.
Quartz
gold
a common mineral in solid form starts with rock
Calcite
Yes they are.
a rock called Magnetite. :3
mineral oil
A rock such as quartzite or marble consists of basically one mineral. So yes, a rock could consist of a single mineral, although most definitions describe a rock as consisting of combinations of minerals.