While the non-nacreous pearl in this three-stone diamond ring has a round shape like a classic pearl, it also shows a faint, flame-like structure on its surface. This effect is due to the arrangement of aragonite in non-nacreous pearls and isn’t found in nacre-bearing pearls. Photo courtesy of liveauctioneers.com and Fellows.
Opaque White Calcareous Concretions Rough in Ring
While the non-nacreous pearl in this three-stone diamond ring has a round shape like a classic true pearl, it also shows a faint, flame-like structure on its surface. This effect is due to the arrangement of aragonite in non-nacreous pearls and isn't found in true, nacre-bearing pearls. Photo courtesy of liveauctioneers.com and Fellows.
Article: Calcareous Concretions Value, Price, and Jewelry Information
Credit: Fellows
| Gemstone | Calcareous Concretions |
| Natural or man made | Natural |
| Jewelry type | Ring |
| Gem State | Rough |
| Color | White |
| Transparency | Opaque |