My very dear friend Tina Holden lives on the most westerly shore of Vancouver Island in Tofino BC. She and I share a passionate addiction for filling our pockets with beachstones when we stroll the shores of our beautiful island... when we're not collecting real stones from the shore, we enjoy using polymer clay to make our own! Tina has put together an extensive tutorial complete with detailed instructions and outstanding photos. She has it for sale on her Artfire Site.
If you love beach stones and want to learn how to make your own or how to improve your technique, I highly recommend this tutorial- she's a master!