what is the approximate quantity of raw aluminum available for mining on earth

 The approximate quantity of raw aluminum available for mining on Earth is difficult to pinpoint exactly, but it is known that aluminum is the most abundant metal in the Earth's crust. It makes up about 8% of the Earth's solid surface by weight. The main source of aluminum is bauxite ore, which is primarily found in tropical and subtropical regions.

As of now, there are significant global reserves of bauxite, estimated to be around 30 to 50 billion tons, but the amount that is actually available for mining depends on various factors like the accessibility of the deposits and economic viability. Over time, new reserves can be discovered, and advances in mining technology can also make previously difficult-to-reach deposits more accessible.

So, while we have a huge amount of aluminum on Earth, the exact quantity that can be mined is always changing due to these factors.