I know you are struggling for ideas for your new business venture involving rocks. Perhaps the folks on here can come up with suggestions?
I'll start with
1. Building miniature stone circles for the gardens of short people (a certain moderator could be your first customer) and call them Pebble Henge
2. They make ideal pets for those that want a pet but are not allowed. They need no food and only minimal exercise
crack the rocks into finer grains or buy some gravel. Glue to the inside of knickers/panties along the gusset and sell as "sex, rock and roll lingerie"