Yes, the stamp has already been carved. It usually says a proverb, good wishes, blessing and etc. A blessing present for you and your loved ones. It is called mood stamp, or leisure stamp which usually reflect an artist's emotion of the painting he/she is creating. To stamp a chop with proper proverbs or phrase will add great touch to your art work.

Soap stone like Green Earth. Plain stone with no decoration on top to create the beauty of simplicity.
The stamp means: Zen Heart

This is an art work created by a Well-known XiAn seal carver.
Stone Size: 1-9/16" x 13/16" x 1-15/16"
Imprint Size: 1-9/16" x 13/16"
It comes with a box.