History: Sapphires have been popular since the ancient Roman times and throughout the Middle Ages.
Durability: Sapphires are among the most durable naturally occurring elements in the world. Sapphires score a 9 out of 10 on the Mohs Scale of Hardness, the only natural item that can scratch a sapphire is a diamond, which has a 10 on the Mohs scale.
Origin: Sapphires can be found in many places throughout the world, including Tanzania, Australia, Thailand, Cambodia, Madagascar, Sri Lanka, the United States, and more.
Colours: Known mostly for their blue variety, sapphires come in an array of colours including pink, orange, yellow, green, purple, colourless and black.
Royalty: Probably the most famous sapphire is the engagement ring given to Lady Diana Spencer in 1981, now worn by Kate Middleton, which features an 18-carat oval blue sapphire surrounded by diamonds.