...Whether ithas received its name of cochineal from its appearance or origin is notclear, but it behaves more like galls and sumac than cochineal, thoughit does give a kind of red with alumina mordants... 
George Field 「Field's Chromatography」
...Cobalt, as furnishing a blue colour, is usually associated with alumina,silica, or tin; and, as furnishing a green colour, with zinc...
George Field 「Field's Chromatography」
...In most specimens iron ispresent, varying in quantity from a mere trace up to five per cent,together with silica and alumina...
George Field 「Field's Chromatography」
...A mixtureof lime and clay, a tufaceous deposit, and an apparently recent depositof soapstone, containing a variety of substances, as alumina, silica,lime, soda, magnesia, and iron...
Charles Sturt 「Expedition into Central Australia」
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