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Green sapphire is a variety of the mineral corundum, which is typically blue in its purest form. However, trace elements of iron, chromium, and vanadium can give corundum a green coloration. Green sapphires can range in color from pale mint green to dark forest green, and can exhibit a range of saturation and clarity. They are prized as gemstones for their durability and rarity, and are often used in jewelry such as rings, earrings, and pendants.