Fluorite Halide Mineral - 2 Unpolished Fluorescent Mineral Specimens Each rock measures approx. 1 to 2 inches along the longest side Impurities can affect the color - color can range from green to purple, but majority of rocks will be green. Considered the "world's most colorful mineral" UV sensitive - Fluoresces a bright blue under short wave and long wave UV blacklights Quantity of 2 raw specimens