How do you separate copper sulphate from calcium carbonate?

If they are mixed powdered solids, then put the mixture in water.

The copper sulphate will dissolve into the water, but the calcium carbonate will remain solid.

Filter.

The filter paper will hold the calcium carbonate

Dry the filter paper and collect the dry calcium carbonate

The filtrate is a blue solution of copper sulphate.

Evaporate the solution to obtain dry crystals of copper sulphate.