If a rainbow
could be captured and set in a ring then it would be called "opal".
Chasing the rainbow (finding the colour layers that exist in the rough
rocks) has been an occupation of lapidaries for years.
is comprised of tiny spheres of silica. When these spheres are of
uniform size and arranged in a three dimensional layer, light is
diffracted into the colours of the spectrum and conveyed as a flash of
is the stone of emotional, physical and mental harmony. Fire opals in
particular are supposed to stimulate passion.