Concretions 4
US$64.00
- Septarian Concretion Set ( both halves )
- Variety: Cut and highly polished Concretion
- Weight : 15.8 pounds (7167 grams)
- Width : 8.0 inches (20.32 centimeters)
- Height : 8.0 inches ) 20.32 centimeters)
- Location: Huerfano County, Colorado
- Formation: Graneros Shale Formation
- Age: 70 - 90 Million years old