Blue sapphires are precious gemstones known for their stunning blue color, which can range from light to deep blue. They are a variety of the mineral corundum and are highly valued in jewelry. The most sought-after blue sapphires come from regions like Kashmir, Burma, and Sri Lanka. These gemstones are often associated with qualities such as wisdom and nobility. Blue sapphires are also durable, ranking 9 on the Mohs scale of mineral hardness, making them suitable for everyday wear in rings and other jewelry pieces.