Yellow Yellow stones and minerals are projective. Ruled by Mercury, they are used in rituals involving communication. If you're having trouble expressing yourself in an intelligible way, try wearing a yellow stone. Writers may receive help with their work by utilizing yellow stones, while public speakers wear them for eloquence. Also ruled by the Sun, yellow stones are protective, while the element of Air, also a ruler, tells us that they can be used to strengthen the conscious mind. They are worn during magick to heighten visualization abilities. Spells involving travel can be performed with yellow stones,perhaps by holding one in your projective hand and visualizing yourself traveling to your desired location. Healthwise, yellow stones are used to promote digestion, to regulate the nervous system, and for skin problems. These are stones of movement, of exchange, of energy and mental awareness.
[Encyclopedia of Crystal, Gem, and Metal Magic-Scott Cunningham]