Minerals refer to the substances, which are found naturally within the Earth and exhibits a crystalline composition.
1. Graphite can be correctly matched with a common mineral. It is a crystalline allotrope of carbon, a native element mineral, and a kind of coal. It is the most stable form of carbon under standard circumstances.
2. Ruby can be correctly matched with a gem. It is the red variety of corundum and is red due to the presence of chromium in the stone. It is a gemstone.
3. Gold can be correctly matched with a precious metal. It is a precious metal, which has been treasured since the ancient times, usually mixed with other metals to enhance its strength or change its color.
Here are the following items in order...
1.) Graphite - common mineral
2.) Ruby - gem
3.) Gold - precious metal
