Colorless sapphires are a type of sapphire that lack any color, making them transparent and often resembling diamonds. They are composed of the mineral corundum, which is the same material that gives colored sapphires their hues. Colorless sapphires are valued for their clarity and brilliance, making them popular choices for various types of jewelry. These gemstones are durable and have a hardness of 9 on the Mohs scale, which makes them suitable for everyday wear. Colorless sapphires can be found in various cuts and settings, appealing to those who prefer a more understated elegance in their accessories.