Cornflower blue sapphires are a highly prized variety of sapphire known for their vivid and vibrant blue color. The term "cornflower blue" refers to a specific shade of blue that resembles the deep, bright blue of the cornflower plant, often described as a rich, velvety blue with slight violet undertones. This color is considered one of the most desirable and is often associated with high-quality sapphires, particularly from Sri Lanka, which is famous for producing gems of this hue.

Cornflower blue sapphires typically have excellent clarity, and when well-cut, they exhibit a brilliant, sparkling appearance. These sapphires are commonly used in fine jewelry, including engagement rings, necklaces, and earrings, due to their striking color and timeless appeal.