Depending on where you live, adequate drainage under stone and pavers is critical. You see a lot of design and ‘how to’ books suggest just using sand as a base. Sand rolls over itself and never packs very tight, instead use a ¼ minus or 3/8 minus crushed stone, it will last much longer and allow for more drainage. Here in the Pacific Northwest, you need a minimum of 6 inches of free draining material and then roughly 1 inch of your 3/8 minus setting bed.
Bluestone, which is a sandstone, soaks up a lot of water and so do concrete pavers.