It was almost impossible to refine. It was very expensive to get the aluminum out of the ore. It was so costly that it was worth more than gold or silver or even platinum. It wasn't until large quantities of electricity were available that smelting processes were created that allowed inexpensive refining.
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Please define "olden days" because each time had different things. To some people 1950 is the "olden days".
olden days irons were built using stone or antique metal
In the olden days, the form of trade that existed in South Africa was barter trade. This means that instead of using money, people would exchange goods for other goods or services.
People used smoke signals, drums and some people had messengers. Yes people did communicate by drawing on rocks which are called rock paintings.
they used the sun and saw where the shadow was to tell the time