Precious and semiprecious stones, worked, whether or not graded, but not strung, mounted or set, precious and semiprecious stones, worked, ungraded, temporarily strung for convenience of transport (excl. precious and semiprecious stones, simply sawn or roughly shaped, diamonds, rubies, sapphires and emeralds, imitation precious stones and semiprecious stones)
Rubies, sapphires and emeralds, worked, whether or not graded, but not strung, mounted or set, rubies, sapphires and emeralds, worked, ungraded, temporarily strung for convenience of transport (excl. rubies, sapphires and emeralds, simply sawn or roughly shaped, imitation precious stones and semiprecious stones)