Ruby stone is a common gemstone that is used in jewelry. It is the red-colored form of corundum; it has a hardness of 9. It was a symbol of royalty and was often depicted in the crown of a king. Ruby gemstone is a variety of corundum, an aluminum oxide mineral. Ruby gemstone is a very hard stone, second only to diamonds. It is colored by the trace element chromium, (Cr) and is the red variety of the mineral species corundum, an aluminum oxide (AlO4) in which chromium imparts the red. Ruby gem helps you to increase your confidence and reduces your anger. If you want to crack your government exam and opt for any job in which you love to work. Then I would suggest you wear a ruby gemstone ring.