This extremely large boomerang is a 19^th Century artifact from the Cooper's Creek region of South Australia. This type of boomerang is called a Murrawirrie. It is not thrown. Instead, it is used like a heavy club or sword. One side is decorated with longitudinal fluting along the entire length. When it is not being used, it is stuck into the sand and this has resulted is much of the fluting being worn away. It is difficult to photograph, but you can clearly see the incised lines when holding it in the light at an angle. I have seen several of these in the past without wear. This is the only one I have seen with surface wear indicating that it is a used implement and was not made for a museum or collector. There are several areas with knot holes and one knot goes through the boomerang. There are several very fine closed age cracks from moisture loss over the years, but nothing that would hurt the strength of this artifact. You have to look very close to see this. There are a few smooth edge bumps that may be part of knot holes that occurred near the edge during manufacture. This is one of my most valuable Australian Aboriginal artifacts. They are rarely offered for sale. It has been in my personal collection for more than 20 years.