This is a Victorian sterling silver royal blue enamel pansy puffy heart charm. The charm measures 5/8" by 1/2" wide and is marked STERLING. It has some enamel loss on the bottom left and middle-left petals. The silver vein in the middle pedal measures 2mm across by 1mm that seems to be a silver mold characteristic on all pansy heart charms on this left side. In taking more photos of this charm I have noticed with the high magnification that the enamel is sheared in the middle pedal, but still has some enamel there to give it color. The charm has minor surface scratches on the back-side that come with age and there are no dents. This color pansy is hard to find and it is not a reproduction and retains its original patina.
Thank you for looking!