Opal is an hydrated silicum dioxide which reveals rainbow colours which change according to the angle of view. Opals exist in many colours : colorless, white, yellow, orange, red, yellowish brown, greenish, blue, gray, black and violet.
This gallery contains 6 photos.
Winged heart opal brooch, Pre Raphaelite tiara (1900s) and William Morris’ illustration. Opalescence is the optical property of a transparent or translucide material which gives it an aspect or a milky color with iridescent reflects like the opals. “Precious opals … Continue reading