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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