This is a wonderful example of a beautifully chased Aesthetic Movement 15 CT gold locket. This item was purchased in England. It is 1 1/4" by 1" and weighs 6.9 grams.
Look at the detail on either side. One side has a cartouche empty and ready to inscribe. The other has a lovely vine of leaves. The item is in the round and I do not see any dings or repairs. There is one lens for a picture and the ring for another.
It has an ample jump ring to suspend it from a dog clasp for an authentic presentation. I do not see a hallmark so it was acid tested in front of me and guaranteed to be 15 CT.