I work with Polymer Clay . The examples are polymer clay and the description of techniques are common terms used in working with polymer clay.
The silicon texture sheets do not need a release agent when used with polymer clay. The soft edges are wonderful for impressing smaller areas or working repeats.
When looking for textures, I look for very detailed patterns.
Growth Ring is a beautiful texture. It is taken from a large stump, probably Yellow Pine.
As you will see in the examples, I am not using it to make fake logs !!!
Here is growth Ring on a flat sheet of polymer clay, antiqued with acrylic paint .