Create jewels following the instructions from the jeweler's book. At the beginning you'll see 4 pieces of jewelry that you have to reproduce exactly. Then you go to the workshop and have to place the stones at their place so the jewel looks exactly as it was shown when you started. If you forgot it, the jeweler's book can refresh your memory.
Click on the stones and at the place where you want to put them; click on the book if you want to read it (also click to switch pages or close it).