This polished 19.25-ct Australian black opal shows the cracks known as "crazing." © Opal Auctions. Used with permission.
Translucent Gray Play-of-Color Opal Stone, 19.25 ct Tumbled from Australia
This polished 19.25-ct Australian black opal shows the cracks known as "crazing." © 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 |
| Origin | Australia |
| Carat Weight | 19.25 |
| Gem State | Tumbled |
| Color | Gray |
| Transparency | Translucent |
| Photo phenomena | Play of Color |