Ruby and 24k brooch

This is a 24K gold and Ceylon ruby brooch from the late 1800's. It's about the same diameter as a US quarter, and has beautiful detail. It was purchased in Ceylon when my great, great, great aunt worked there at a mission in some capacity.

I'd love to hear about the type/style of work.

Edit: added a couple of photos. Pin appears to be very basic and attached with non-gold solder of some variety - there's a bit of corrosion/tarnish on the hinge area of the pin.