Cave Bear Partial Claw Core - SOLD 1.41"This specimen is a 1. 41" Cave Bear partial claw core recovered from Poland. The estimated age is 25,000 years old. The keratin from the claw has worn away over the years, exposing the bear's bone core. This claw core comes from the species Ursus spelaeus, which gets its common name from the location its fossils are found: within the cave systems the bears used to hibernate.