While I like both the boldly striped females and blue adult males, I think the most beautiful Eastern Pondhawks are males in the process of changing colors. The top photo on this page shows a male whose thorax is sea green just frosted with blue, suggesting a semiprecious stone. I've seen Eastern Pondhawks in the metro area, but so far only in small numbers. This male still has some green on its thorax. A juvenile male.
Females look similar.
Back view of a mostly blue male.