4 adjectives to describe potsherd

In the middle of the court there stood the fragment of a pillar, and on it was placed a very low stool which these cruel men maliciously covered with sharp flints and bits of broken potsherds.

Our excavations in 1915 yielded a mass of rough potsherds, a few Inca whirl-bobs and bronze shawl pins, and also a number of iron articles of European origin, heavily rustedhorseshoe nails, a buckle, a pair of scissors, several bridle or saddle ornaments, and three Jew's-harps.

While I was examining the ruins and digging up a few attractive potsherds bearing Inca designs, Dr. Giesecke, the President of the University of Cuzco, who had accompanied me, climbed the mountain above Tipon with Dr. Aguilar and reported the presence of a fortification near its summit.

We found among the ruins a few crude potsherds and some bits of obsidian.

4 adjectives to describe  potsherd