Was found in Israel. A stone formed like half of a ball, flat bottom about 78 mm diameter, weigh 670 grams. No marks on it. What could it be?
https://photos.google.com/photo/AF1QipOVpgMRKyJm57ADZkSrqyB1QnHI_hBhpqhe2Hft
https://photos.google.com/photo/AF1QipM45eNbmzHaIeKrxm1gm2odWGVJuhSE2Mz8f6jF