It treats the major diseases like abdomen, kidney, heart, and brain-related diseases. Emerald helps to cure the skin-related problems, respiratory problems, and nervous system problems and this stone is also good for pregnant women, as it decreases the stress level of women and labor pain as well. The Emerald (Panna) stone thus highly benefits the Leo descendant. Virgos are ruled by Mercury so this stone is most suitable for this sun sign too. The emerald is the sacred stone of the planet Mercury and has long been considered a symbol of hope. The emerald is said to bring the wearer wisdom. The most effective time for an emerald’s power is the spring. Emeralds are lucky for love, so if you give your lover an emerald, it may keep them faithful to you.