Diamonds are the most popular of all of the world`s gemstones.
They are often referred to as the "gem of gems", due to their exquisite beauty, which is largely a result of their ability to refract light. While all transparent gems refract light, the refractive index of the diamond is the highest of all gems, making them sparkle more than other stones.
Natural diamonds were formed approximately three billion years ago, 150 kilometres beneath the earth´s surface.
Under very high temperatures (between 900 and 1300 degrees Celsius) and great pressure, carbon atoms combined to crystallise and grow as diamonds within rocks.Diamonds are unique.