Ruby is a gemstone that belongs to the corundum mineral species.
It is a variety of aluminum oxide with traces of chromium and iron that give it its characteristic red colour.
Rubies are one of the hardest minerals, second only to diamonds on the Mohs scale, and are extremely durable.
The largest ruby ever found weighed more than 400 carats and was discovered in Myanmar.
The ancient Hindus believed that rubies could protect the wearer from evil, while the Burmese believed that rubies could bring good fortune.
Rubies are believed to enhance one's energy levels, promote vitality and provide protection against negative energy.
Ruby crystals are also thought to stimulate the heart chakra and boost confidence, passion, and motivation.
They are often used in meditation and visualization practices to help focus the mind and increase concentration.