This vintage ring shows off a quahog pearl with an attractive gradient in color. © Kojima Pearl. Used with permission.
Opaque Pink Calcareous Concretions Rough in Ring
This vintage ring shows off a quahog pearl with an attractive color gradient. © Kojima Pearl. Used with permission.
Article: Quahog Pearl Buying Guide
Credit: Kojima Pearl
| Gemstone | Calcareous Concretions |
| Natural or man made | Natural |
| Jewelry type | Ring |
| Gem State | Rough |
| Color | Pink |
| Transparency | Opaque |