The mineral that gives emeralds their green color is chromium. Emeralds are a variety of the mineral beryl, and while beryl itself is colorless, the presence of chromium (and sometimes vanadium) causes the vibrant green hue characteristic of emeralds. The intensity of the green color can vary based on the concentration of chromium. Emeralds are highly valued gemstones traditionally associated with love, rebirth, and fertility. Their allure and the deep, lush green color make them a favorite among gem enthusiasts.