The Green Stone

The Green Stone was naturally gifted to the Queens of these wee winged folk for they are the master gardeners of the land.

... fairy magic comes from the Green Stone. Their magic dust serves as a powerful fertilizer for not only the gardens in their kingdom but also the varied flora throughout all of Stonesway. These tiny denizens simply beat their dust covered wings and the magic is released. It either falls in their wake or the Wind Stone of the bees carries it across the land.