Found this reputed "fossil bone" specimen five feet below the ground in sandy soil near the Delaware River in Southern New Jersey at the site where a 85' tulip poplar tree fell and lifted the root ball. Identified as "glacial, river worn fossil bone" by Gary's Gem Garden in Mt Laurel, NJ. Any thoughts as to the whether the structure of the reputed ''fossil bone' may be of biological origin? Thanks for your thoughts!