This yellow stone is associated with material things of the earth, and is good for creating abundance and money. It's excellent for balancing the lower three chakras. This stone is very grounding, and helps to center us in the practicalities of the here and now. It has a calming effect. It can be used for purification, and is excellent for the throat chakra.
Blue aventurine aids communication, and peach aventurine enhances the crown chakra energies.
AQUA AURA opens and cleanses the chakras. ONYX is used to increase stability and enhance one's faith. OPAL enhances mediumship or communication with spirits. It's great to use when starting a new business or other big endeavor. Next week, check back for more on crystals.