Each of the signs of the zodiac rules a particular gemstone, a fact which has been widely used in jewelry from time immemorial. Conversely, each gem conducts the energies of the particular sign or planet with which it is sympathetic. Wearing the stone of your sign will focus the energies of the sign through the gem, enabling their expression in your daily life. The energy of the sign is channelled through the planet placed there (usually the Sun, Moon, or planetary ruler) and this energy is expressed and focused through the corresponding gem.