The principal ores generally classified in this heading are :
(1) Antimony ores. (a) Cervantite, antimony oxide. (b) Kermesite, antimony oxysulphide. (c) Senarmontite, antimony oxide. (d) Stibnite (or antimonite), antimony sulphide. (e) Valentinite or white antimony, antimony oxide. (2) Beryllium ores. (a) Beryl, double silicate of beryllium and aluminium. (When in the form of a precious stone, beryl or common emerald falls within heading 71.03.) (b) Bertrandite. (3) Bismuth ores. (a) Bismuthinite (or bismuth glance), bismuth sulphide. (b) Bismutite, hydrated bismuth carbonate. (c) Bismuth ochre (or bismite), hydrated bismuth oxide. (4) Germanium ores. Germanite, copper germano‑sulphide. The heading excludes those products known in trade as "concentrates" of germanium, which are obtained by processes not normal to the metallurgical industry (generally heading 28.25). (5) Mercury ores. Cinnabar, sulphide of mercury. Indium, gallium, rhenium, hafnium, thallium and cadmium are not extracted directly from one particular ore, but are obtained as by‑products of the metallurgy of other metals (e.g., zinc, lead, copper, aluminium, zirconium, molybdenum).
|