Highly polished and domed, these oval A+ grade Prehnite cabochons are stunning. These large beauties are 40 x 30mm, with a 5-6mm height on average. The color is a wondrous transluscent green with threads of black tourmaline. No two of these Prehnite cabochons are exactly alike in coloring, but all of these domed cabochons are beautiful. Prehnite is said to highten prior knowledge of an event, and bestow the gift of prophecy. Don't miss out on this one!