Weegy: So far, over 2000 minerals have been found, and every year new ones are discovered. That's a lot of minerals! Don't worry! You don't need to know them all to be a rock hound. In fact, only a few dozen are common within the rocks of the Earth's crust. [ That means the rocks in your backyard probably have common minerals in them that you can identify.
Minerals are divided into different groups based on their chemistry.
Silicate ... (More)