Sapphires are from the corundum family of minerals. Sapphires are found in all colours except red; red “sapphires” are actually rubies. These magnificent gemstones are mined all over the world and are the second hardest gemstone just under Diamonds. Princess Diana’s Sapphire ring is the most famous engagement ring in the world. They are associated with wealth and royalty. The sapphire is also the birthstone associated with the month of September.