“Opal Mosaic” by Mauro Cateb is licensed under CC By 2.0
Assembled Opaque Blue Play-of-Color Opal Stone Cabochon
Mosaic opal. Photo by Mauro Cateb. Licensed under CC By 2.0.
Article: Appraising Opals
Credit: Mauro Cateb
| Gemstone | Opal Stone |
| Natural or man made | Assembled |
| Gem State | Cabochon |
| Color | Blue |
| Transparency | Opaque |
| Photo phenomena | Play of Color |