A normal diet provides easily enough calcium to meet most people's needs. Is the question asking about how much we should consume in total, or how much of the various minerals we should consume from supplements? In the first case, the answer is "about as much as you are currently consuming", while in the second case, the answer is "probably none."

While prevalent enough that most consider the whole "your natural diet is about perfect" myth to be mostly harmless or even virtuous I'm going to declare it toxic. It would be completely bizarre if it turned out that our arbitrary, drastically variable diets - which are often produced from heavily farmed soil - just happened to give us the optimal amount of minerals.