Blue sapphire is the most classic and widely recognized variety within the sapphire family, which is itself a form of the mineral corundum (aluminum oxide). It is prized for its rich, velvety blue color, durability, and long-standing association with royalty, wisdom, and protection.
The signature hue is a deep royal blue, though it can range from a pale cornflower blue to an inky midnight blue. The most valuable sapphires exhibit a vivid, pure blue with strong saturation that is neither too dark nor too light. The term “Kashmir blue” refers to the finest, almost velvety blue sapphires originally discovered in the Kashmir region (India/Pakistan), although these are incredibly rare today.
Hardness: Sapphires rank 9 on the Mohs scale, second only to diamonds, making them excellent for everyday wear, particularly in rings.
Symbolism: Historically worn by royalty (such as Princess Diana’s and now Kate Middleton’s engagement ring), the blue sapphire is a symbol of truth, loyalty, and protection.
