The picture used for my gravatar is of a necklace I made, one of the first actually. The piece is called Earth Mother, the pendant measures about an inch long. it’s lime green aventurine is the shape of a primitive goddess figure. The beads are multi-colored Fancy Jasper. Their colors range from an opaque white to purple.
I use Picasa to edit my pictures. The program is a free download, easy to use and allows me to put a watermark on all my pictures.