There are hereby specifically exempted from the provisions of this chapter and from the computation of the amount of tax imposed by it, gross receipts from the sale of coins, currency, or bullion. For the purposes of this section, the term, bullion, means any bar, ingot, or commemorative medallion of gold, silver, platinum, palladium, or a combination of these metals where the value of the metal depends on its content and not the form. For the purposes of this section, the terms, coins and currency, mean any coins or currency made of gold, silver, or other metal or paper which is or has been used as legal tender.
SDCL 10-46-71