Sapphires, typically blue, can actually come in every color except red, which are classified as rubies. One of the most famous sapphires is the Star of India, a 563-carat gem displaying a rare star-like phenomenon called asterism. Ancient Persians believed the Earth rested on a giant sapphire, giving the sky its blue hue. This gemstone is also celebrated for its remarkable hardness, second only to diamond, making it ideal for use in high-durability applications like watch crystals and electronics.
