Amethysts are a type of quartz crystal known for their striking purple color, which can range from light lavender to deep violet. This beautiful gemstone is formed in volcanic rocks and is often found in geodes. The color of amethysts is due to the presence of iron and other trace elements within the crystal structure. These gemstones have been valued for centuries, not only for their beauty but also for their supposed healing properties. Amethysts are commonly used in jewelry, such as rings and necklaces, and are the birthstone for the month of February.