In the stash, I found two finished hour glass blocks, and there were some more ready to be made. There is a cool trick to doing it the fast way without the trouble of a stretched seam from sewing on the diagonal.
Take two different fabrics, stacked right sides together. These are 12" squares. Draw lines from corner to corner.
Sew a quarter inch on each side of the line in one direction; cut in half on the center line.