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A blue sapphire is a precious gemstone that is part of the corundum mineral family. It is known for its deep blue color, durability, and rarity.

Color

Blue sapphires have a deep blue color that is evenly distributed throughout the stone

The color comes from trace amounts of iron and titanium

Sapphires that are not blue are called fancy sapphires and can be many colors

Durability

Blue sapphires are very durable, ranking 9 out of 10 on the Mohs scale of mineral hardness

Rarity

Blue sapphires are rare, especially those with high clarity

The most valuable sapphires come from Kashmir, where they can only be mined for a few months a year