Sapphire is a precious gemstone known for its rich, vibrant blue color, although it can come in a range of colors such as pink, yellow, and green. It is a variety of corundum, a mineral composed of aluminum oxide. The blue color is primarily due to trace amounts of iron and titanium. Sapphires are prized for their durability, ranking 9 on the Mohs scale of hardness, making them suitable for daily wear in jewelry, particularly rings and necklaces.

In addition to their beauty, sapphires are often associated with wisdom, loyalty, and nobility. They have been used in various cultures for centuries, both as adornments for royalty and as symbolic stones in religious or spiritual contexts. Famous sapphires, like the one in Princess Diana's engagement ring (now worn by Kate Middleton), have helped cement the gemstone’s status as a symbol of elegance and strength.