Boulder opal rough, thin opal layer attached to original matrix, 6 cm in length. Photo by Hannes Grobe. Licensed under CC By-SA 2.5.
Translucent Blue Play-of-Color Opal Stone Specimen
Boulder opal rough, thin opal layer attached to original matrix, 6 cm in length. Photo by Hannes Grobe. Licensed under CC By-SA 2.5.
Article: An Incredible Union of Colors: Choosing Opal Engagement Ring Stones
Credit: Hannes Grobe
| Gemstone | Opal Stone |
| Natural or man made | Natural |
| Width | 60 |
| Gem State | Specimen |
| Color | Blue, White |
| Transparency | Translucent |
| Photo phenomena | Play of Color |
| Multi-color | Bi-color |