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classic rocks are not minerals. limestone is
The difference between breccias and conglomerate is that breccias are angular and conglomerates are smooth. What causes rocks to be smooth is transportation, such as when rocks are in a stream and are worn down. Therefore transportation is what causes the difference between breccias and conglomerates.
monomineralic - one mineral polymineralic - multiple minerals
describe the textural difference between coarse-grained (phaneritic) and fine-grained (aphaneritic) rocks
most metamophic rocks contain a high amount of oxygen and silicon
Gems are valuable rocks aren't.
A rock is a rock, and a diamond is a gem.
Paleozoic rocks contain fossils while Precambarian rocks had no fossils since at that time there was only single celled organisms.
ice and loose rocks
The rock is a higher grade the deeping into the ground or mountin it is.
ice and loose rocks
The difference lies in the method of the rock's creation (melting, sediment, pressure), and the elements available when and where it forms.