Ruled by Venus, the stone of Libra is the green Tourmaline, and, more generally, all the stones in green. The Green Tourmaline is particularly suitable for matters of love. In moments of exhaustion where you feel a little subdued you can opt for the opal that causes mental and physical energy and preparation activities. In the workplace instead Malachite is indicated that considerably strengthens the critical thinking skills and helps concentration and good teamwork. The Chrysoprase instead serves to increase the sensuality and attract a special someone, embedding the stone in a necklace or a ring.