Calcareous Concretions – Natural, Rough, Pink
18k gold ring with an oval-shaped, pink conch pearl and pear and marquise-cut diamonds. Mikimoto maker's mark. Photo courtesy of liveauctioneers.com and Heritage Auctions.
Article: Calcareous Concretions Value, Price, and Jewelry Information
Credit: Heritage Auctions
| Gemstone | Calcareous Concretions |
| Natural or man made | Natural |
| Jewelry type | Ring |
| Gem State | Rough |
| Color | Pink |
| Transparency | Opaque |