Hello, here are Three Small 100% natural Pygurus sp. Sea Urchin or Sand Dollar like fossils that have been polished! They were quarried in the Morondava River Basin, near the town of Sakaraha, Southwest, Madagascar.
All have great colors and fine definition! These "rocks" were living Animals in the Earths Ocean during the Jurassic period, Oxfordion Age a Crazy! 161 to 156 million years ago.
Please note the Ruler in the photos for sizes.