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I must say… no offence but… your statement is a bit misleading… the link in my post IS the whole book. And you can download as a PDF file, or read online as text.

The link you presented is...

Well… I stand corrected… they wouldn’t simply use the bauxite in its raw state.
They do however get the aluminum oxide from bauxite… it is mixed with clay (pottery clay) as a binder; the binder...

Those "maroon" colored stones are made from a naturally occurring ore called Bauxite (Red Dirt); it is a mixture of Aluminum Oxide and Iron Hydroxide (rust or rogue). Though aluminum oxide is white...