Shard

A potsherd, a piece or fragment of broken pottery.Also, any small part of something, especially when made of a brittle substance, such as glass. This word is sometimes spelled "sherd," and pronounced that way too.Artists have used shards as a found material in making works of various kinds, as in the making of pique assiette (also called picassiette) and trencadis, which are techniques of mosaic or tiling using shards.