Calcareous Concretions
Some of these pearls show the unusual "eye effect." © Kari Pearls. Used with permission.
Article: Quahog Pearl Buying Guide
Credit: Kari Pearls
Gemstone | Calcareous Concretions |
Natural or man made | Natural |
Jewelry type | necklace |
Gem State | Rough |
Color | Purple, White |
Transparency | Opaque |
Photo phenomena | Chatoyancy |
Multi-color | Bi-color |