This old Aboriginal boomerang ( throwstick ) was made out of a dense heavy hardwood, possibly Jarrah, by Aborigines from West Australia. Both the upper and lower surfaces have shallow scalloped adze marks. The tool used to form the surface is a stone tipped adze. The surface was then scraped smooth and polished, possibly by using a stone scraper and kangaroo fat. Most throwsticks from Western Australia have this adze chisled texture. The upper surface is convex and the lower surface is nearly flat. It was probably made in the early 20th Century. There is a natural knot that runs through the elbow, a closed crack that extends a couple of inches from one tip and several edge dings/chips as expected for a artifact that was actually used by Aborigine nearly a century ago. Very nice and rare stone worked artifact from an indigenous group that no longer uses boomerangs to hunt. Span = 55 cm ; Weight = 220 gm