Final answer:
The inner coffin from Tutankhamun's sarcophagus was made of gold with inlay of enamel and semiprecious stones.
Step-by-step explanation:
The medium of the inner coffin from Tutankhamun's sarcophagus was gold with inlay of enamel and semiprecious stones. The outer two coffins were made of wood and covered in gold along with various semiprecious stones. However, the innermost coffin was made entirely of solid gold.