Ammolite
Ammolite and black opal can look very similar. Currently, ammolite is pricier than black opal. "Ammolite," photo by Jessa and Mark Anderson. Licensed under CC By 2.0.
Article: Opal Simulants: How to Spot Imitation Opal
Credit: Jessa and Mark Anderson
| Gemstone | Ammolite |
| Natural or man made | Natural |
| Gem State | Cabochon |
| Color | Green |
| Transparency | Opaque |
| Photo phenomena | Iridescence |