Ruby (Corundum,) 

 Aluminum Oxide with Chromium:  Al2O3:Cr 

The name Ruby comes from Ruber which is Latin for red. 

The color of a ruby is due to the element chromium.

Mohs:9 Among the natural gems only Moissanite and Diamond are harder

Ruby is a stone of Divine creativity. It boosts your energy levels and promotes high self-esteem, intuition, and spiritual wisdom.

Ruby is a symbol of good fortune, pure love, and loyalty. As an aphrodisiac stone, it brings vigor into your life. It is one of the most powerful red stones.

 The ruby is considered to be the most powerful gem in the universe and is associated with many astral signs. 

To own a ruby is said to have contentment and peace. Placed under a pillow the ruby may ward off bad dreams. Given as a gift, the ruby is a symbol of friendship and love. The ruby is also the symbol of vitality and royalty. 

Ruby works with the flow of blood as an aid to circulation. It aids the cleansing and al.otinfection or germs in the blood. 

Ruby is the traditional birthstone for July