I found an example of this very common large medal about 4-5 months ago. Finally got around to photographing it. There is a good amount of lovely purple, blue, and reddish toning around the portraits -- but very hard to capture in photos. This is now a part of my ongoing (but slow) Victoria portraits collection.
aint got a clue if this type of thread has been started before, anyway, here's a couple from the past that i have found, the commonwealth was laying on the ground saw it before the detector did