With a Gold IRA, you would purchase gold, silver, platinum, or palladium that meet IRS purity principles

https://franciscosdco555.cavandoragh.org/the-position-of-gold-in-individual-retirement-accounts-a-strategic-investment-perspective

With a Gold IRA, one could purchase gold, silver, platinum, or palladium that meet IRS purity standards. Your custodian guides every one buy.