Sapphires have been treasured as some of the most precious gemstones for thousands of years. Popular in ancient Roman, ancient Persia, and throughout the Middle Ages. Sapphires get their colors from trace elements in the mineral corundum. Classic blue sapphires contain iron and titanium, and trace elements of chromium can turn corundum pink, while more chromium turns it into a ruby.
Sapphires are among the most durable naturally occurring elements in the world. Gemstones are rated on their ability to withstand scratching based on a system called the Mohs Scale of Hardness, and sapphires score a 9 out of 10. The only natural item that can scratch a sapphire is a diamond, which has a 10 on the Mohs Scale. The durability of sapphires makes them an excellent choice for engagement rings and other jewelry you plan to wear every day.