These apps have a database for you to reference different types of rocks for identification ... a common mineral also known ...

Meteorites like this offer invaluable insights into the formation and evolution of the solar system. "They transport us back in time, providing clues to the age, formation and chemistry of our solar ...

Unlike alluvial gold, which is found as very small flakes on riverbanks, gold-bearing rocks have to be dug out of the ground. We're after pure gold, but rock that contains gold also includes lots ...