An original bill to authorize the disposal of certain materials from the national supplemental stockpiles.

Authorizes the Administrator of General Services to dispose from the National stockpile established pursuant to the Strategic and Critical Materials Stock Piling Act and the supplemental stockpile established pursuant to the Agricultural Trade Development and Assistance Act of 1954: (1) 28,000 long tons of tin; (2) 10,000 short tons of antimony; and (3) 2,500,000 carats of industrial diamond stones.

Requires the Administrator, in disposing such materials, to take steps to protect the United States against available loss and to protect producers, processors and consumers against disruptions in the markets of such materials.