In 1975, an advertising executive named Gary Dahl produced the first pet rocks which sold for US $3.95 each.
The pet rocks, were wrapped in packing material and placed in a
small cardboard box constructed like a pet carrier. Included was a "Pet Rock Training Manual", with instructions on how to properly raise and care
for your new pet. The instruction manual contained several commands
that could be taught to the new pet. While "sit" and "stay" were easy to learn, "roll over" required extra help from the owner.
In history, we can find pet rocks dating back to Ancient Egypt in tomb paintings, North America. In ancient Britain we have Stonehenge which is an iconic structure of standing stones. In fact in many cultures there have been evidence of pet rocks or rocks having a special significance.