Agate
The spiral shells in this specimen of "turritella agate" are actually from another species of mollusk. However, the name is still commonly applied to this variety. "'Turritella Agate' (chertified fossiliferous lacustrine limestone) (Laney Member, Green River Formation, Middle Eocene; North Barrel Springs Draw, south of Wamsutter, Wyoming, USA) 4" by James St. John is licensed under CC By 2.0
Article: Agate Value, Price, and Jewelry Information
Credit: James St. John
Gemstone | Agate, Chalcedony, Quartz |
Natural or man made | Natural |
Origin | United States |
Origin details | North Barrel Springs Draw, south of Wamsutter, Wyoming |
Gem State | Rough |
Color | White |
Transparency | Opaque |