Polished Jelly Bean Jasper JBJ345 cla The interesting cylindrical cavity is

The interesting cylindrical cavity is all that remains of a fossil belemnite which were a squid-like creature with a tapering torpedo or bullet shaped body

Dimensions at widest points approximately 150 mm  x 100 mm x 6

Weighs  272 grams

Dimensions at widest points approximately 105 mm x 60 mm

Approximate dimensions at widest points 150 mm  x 95 mm  x 60 mm thick

Polished Jelly Bean Jasper JBJ345 cla The interesting cylindrical cavity isJBJ345 Jelly Bean Jasper or Red Jasper Conglomerate in Hematite rich matrix. A rough rock, cut and polished on one side with a natural back. Dimensions at widest points approximately 200 mm x 110 mm x 50 mm thick. Weighs: 1,939 grams It occurs in a geological unit called the "Mt. McGrath Formation" which has an age of close to 2 billion years. Nearest town is Paraburdoo in the Pilbara region of Western Australia.