StumpChair (facebook.com/StumpChair) was met with quite a bit of success in the past few years and it got me thinking about what else I could make into a chair. Rocks seemed liked like the next logical place to go. Drilling holes in rocks is much more permanent and damaging than in stumps so public installation didn't seem appropriate without permission. For this first version of the RockChair I decided to bring a rock into the shop. This rock was purchased from a landscape supply company and the chair was assembled entirely legally at the Pier 9 in San Francisco. Aside from that, the process is almost identical to StumpChair. (http://www.instructables.com/id/StumpChair/)
Step 1: What You'll Need
A Big Rock - Boulders can be purchased from landscape supply yards as mine was, or you can probably find one lying around if you don't live in a city.
A Chair Back - I always have an eye out for broken chairs that people are discarding. Discarded chairs are surprisingly common.
Epoxy - You will probably need more than you anticipate.
Spray Paint (or brush on paint if you want to get fancy) - Only if you want it.
Hammer Drill - A regular corded drill will probably work but hammer drills really are amazing tools for drilling in stone and concrete.
Masonry Drill Bits - WARNING regular drill bits for wood or metal will NOT work.
A Cart - This is optional(ish). If you have two strong friends who are willing to help you out you probably don't need a cart but it really will make the whole thing easier. Instructions on making a simple cart are in the next two steps.
Safety Glasses - I forgot to put them in the photo because they were on my face already. Oops.