Oracle bones (Chinese: 甲骨; pinyin: jiǎgǔ) are pieces of ox scapula or turtle plastron, which were used for pyromancy -- a form of divination -- in ancient China, mainly during the late Shang dynasty. Scapulimancy is the correct term if ox scapulae were used for the divination; plastromancy if turtle plastrons were used.
what was the purpose of oracle bones in ancient china
used for pyromancy -- a form of divination