Citrine is a yellow to golden-brown variety of quartz, known for its warm, vibrant color, which can range from pale yellow to deep amber or even reddish-brown. The name "citrine" is derived from the French word "citron," meaning lemon, due to its lemon-like yellow hue. It is a popular gemstone in jewelry, often valued for its cheerful, sunny appearance and its association with energy, success, and abundance. Citrine's color is caused by trace amounts of iron within the quartz. It has a hardness of 7 on the Mohs scale, making it suitable for use in rings, necklaces, and other pieces of jewelry. Citrine is also thought to bring positive energy and is considered a "stone of success" in metaphysical traditions.