corundum  search
BToxides
 .corundum
RTcorundum deposits
 gems
 alumina
 aluminum oxides
 amethyst
 rubies
 sapphire
SNAs of 1981, use corundum deposits for corundum as a commodity (abrasives).
corundum deposits  search
RTabrasives
 corundum
 industrial minerals
SNFor corundum as a gem, use corundum and gems. Commodity. See List C. For corundum as a gem, index the specific type of gem.