Add decoration

How do I put an ornament on a body because I want to take it from an image with the extension jpg and png
be visible on the surface
Is there anyone who knows jewelry design in Blender

Well if you want this image as texture then you may have to UV unwrap it… according to your second question this may be not a good idea… Could you elaborate a little more what you want to achieve in a more complete description (and may also change the title accoeding to that so that maybe someone else will be interested to answer…)?