Rocks and Minerals
A Rock is a natural material that is made of one or more minerals. Basalt is the most common rock on Earth, a Mineral is a chemical element or compound that is naturally occurring and has a crystal structure. There are about 3,000 known minerals on Earth, Quart is the most common mineral found on Earth. Gold is extremely soft and one of the most valuable minerals, Diamond is the hardest natural substance known on Earth also Marble forms metamorphosed carbonated rock, usually limestone Breccia is a rock made from generally large pieces cemented together.
The rock song all about rocks enjoy!