Styrofoam stamp attached to a cork:
How to use Clear Cardstock and Masking with Dies and Stamps the easy way!
green stamps used to create an awesome pattern. More
Autumn Hathaway: hand carved stamps
Stencil Spray & Stamp.mp4 - YouTube
Hand-carved stamps by Regina Lord
So much texture in a single pinecone
Ro Bruhn carved stamp
These are DIY cookie stamps, but you could do something like this for polymer clay, using polymer clay for the stamps.