Note: the picture quality is not that great because my camera had a hard time focusing.
Step 1: Individual parts
These four shapes are most of what is necessary to make this rose. Just have them cut or cut them yourself, but make sure you have a hole through the middle of them ( except for the leaf-pic 1) that will fit a screw or bolt. The holes MUST be the same size. You can finish them however you want. You can grind them, polish them, paint them, etc.