hi
bluestone is a generic name given to many minerals
it is most commonly applied to Chalcanthite, which is mostly copper sulphate so is unsuitable for aquariums.
it is also some tmes applied to Lazurite, which contains sulfate, sulfur and chloride again unsuitable for aquariums
on the whole I'd say no
but there are many other minerals called bluestone
if you knew exactly which one you have I could tell you posativly.