Explanatory notes
… ‑ Other The principal ores generally classified in this heading are : (a) Argentite, silver sulphide. (b) … (c) Cerargyrites (or horn silver), silver chlorides and iodides. (d) Polybasite, sulphide of silver and antimony. … contain other metals of the platinum group (i.e., iridium, osmium, palladium, rhodium and ruthenium). …