Strong's G3749 — ὀστράκινος (adjective)
ostrakinos (os-tra'-kin-os) adj.
1. earthen-ware, i.e. clayey
2. (by implication) frail
[from ostrakon ("oyster") (a tile, i.e. terra cotta)]
KJV: of earth, earthen 
Occurrences: 2