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