Aluminum-oxide, iron-hydroxide, and silicate mixture {bauxite}| is main aluminum ore and is mainly in Yugoslavia, France, Italy, and Guyana.
BeAl2O4 [2 and 4 are subscripts] {chrysoberyl} {alexandrite} has beryllium and aluminum and makes violet gems and cat's eyes.
Al2O3 [2 and 3 are subscripts] {corundum} {emery} has aluminum.
Corundum can be red transparent jewels {ruby, mineral}|.
Corundum can be blue jewels {sapphire}|.
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Date Modified: 2022.0225