Here are two pendants in the making. After rolling the clay and cutting into shapes, I add the stringing holes that are necessary to use the pieces as jewelry. I have a little tool for this purpose.
I do alot of 3D designs, and what you see here are the scoring marks. The pieces being joined must be roughed up, and liquid clay, or slip, applied before joining. This is because clay shrinks when it dries, and the pieces would separate without the roughing and the "glue".