41.3-ct boulder opal in a gold and diamond mounting. © Opal Auctions. Used with permission.
Opaque Green Opal Stone, 41.3 ct Cabochon in Ring
41.3-ct boulder opal in a gold and diamond mounting. © Opal Auctions. Used with permission.
Article: An Incredible Union of Colors: Choosing Opal Engagement Ring Stones
Credit: Opal Auctions
| Gemstone | Opal Stone |
| Natural or man made | Natural |
| Carat Weight | 41.3 |
| Jewelry type | Ring |
| Gem State | Cabochon |
| Color | Green, Blue |
| Transparency | Opaque |
| Multi-color | Bi-color |