THE TAURUS was created with accents of green aventurine& black tourmaline. available in black onyx, howlite and lava rock. taurus is a fixed earth sign, ruled by the planet venus and is represented by the bull. green aventurine brings good fortune, black tourmaline draws in all negative energy. the black onyx option brings protection. the howlite option brings peace. the lava rock option can be used for aromatherapy with essential oils.