Stone ball which allegedly is one of the tools of early humans, many found in the archaeological Blora , especially around the flow of DAS bengawan Solo.
In addition to the stone Balls the findings of the public reported and submitted to the Government Blora , in the House of the artifacts are also stored ball stone tools and flakes artifacts of early man, which was discovered during research by BPSMP Sangiran in Kabupaten Blora 2018 – 2021
