Psalm 22:15 (b) A potsherd is a piece of a broken clay pot which has no value. The Lord is describing in figurative language the way He would suffer on Calvary, be broken, and apparently have no value to GOD or to men.
Proverbs 26:23 (b) This is a remarkable description of a hypocrite. The potsherd is worthless and the silver dross is worthless, yet the dross on the potsherd is an effort to make it look attractive and appear valuable.
Isaiah 45:9 (a) Man is described as a broken piece of gourd fighting with and arguing with another man who is also a piece of a gourd. It is an expression of derision and contempt.