November birthstone citrine is the most popular yellow gemstone. A variety of quartz, its name its derived from the same source as our favorite yellow citrus fruit, the lemon. Because citrine is rare in nature, it's often created by heat treating other quartz stones such as amethysts. Citrine is equally stylish set in complementary yellow gold or in constrasting metals like sterling silver and white gold. Add vibrant color and eye-catching shine with a citrine necklace, bracelet, ring, or earrings.