Crab Concretions - Unprepared Fossil Quality:Standard they have a circular cutout

they have a circular cutout in their center which starts at the bottom and goes approximately halfway up the inside

​Beryl enhances courage

Base (universal)Size approximately: 45mm x 14mm x 12mmWeight approximately: 1

Mined from: British Columbia

or any other rotary mill

Crab Concretions - Unprepared Fossil Quality:Standard they have a circular cutoutMined from: Isle Of Sheppey, England Era: Cenozoic Geological Age: Approximately 33. 9 56 million years ago Description: These crab fossils from the Isle of Sheppey, England, offer a fascinating glimpse into prehistoric marine life. These fossils date back to the Eocene epoch, placing them roughly between 56 and 33. 9 million years ago, during the Paleogene period. At this time, the area that is now the Isle of Sheppey was submerged under a shallow