Opals contain the full spectrum of light colors, so they correlate with, activate, and help balance the 7 chakras. Opal has historically been associated with desire, love, and passion, and it can also help to stabilize emotions. Opal is an excellent companion for aiding in astral travel and accessing your higher self during meditation.
A rough version of crystal is usually cut from a much larger piece of mined material that is too large or heavy to be used by a person. Rough chunks such as calcites are often acid-washed to subtly smooth out rough edges that may cause cuts or injury and to prevent further flaking or breakage.