Sapphire is the precious stone associated with September. This beautiful gemstone is known for its rich blue color, though it can also come in other hues, such as pink, yellow, and green. Sapphires are a variety of the mineral corundum and are particularly valued for their durability and brilliance. In addition to being a popular choice for jewelry, sapphires have symbolic meanings, often linked with wisdom, royalty, and divine favor. The deep blue of a sapphire is often associated with the sky, making it a fitting stone for a month that transitions into autumn in many parts of the world.