I really like it, diamond and rubies. But I don't wear pins. I wonder if it could be used as a horizontal bail for a spinel? Or maybe use it as a vertical bail supporting a spinel suspended from pearls? White pearls? What do people think?
It is pretty and unique. Do you have an inspiration pic for what you are describing? I think getting the proportions right would be important for what you are describing. What are the dimensions of the pin?
What about something like the pic above? You could do it with a strand of pearls instead of a chain, too.
Pins unfortunately are very out of fashion. Good buying opportunities though. I have set a small round brooch onto what was a gold watch band. Repurposing two pieces of Jewelry. So depending of the size of the pin, a bracelet might be an option. Converting to a pendant you can do lengthways or as a “drop” shape. Again, with a lengthways pin, you can put it on a gold chain, pearls or even your choice of gemstone bead necklace. Your pin I think would look fabulous a ruby bead necklace.
The simplest way to wear it would be as a necklace/pendant. It could be turned into a bracelet. However, you may want to really think about if you want to permanently change it. I do think women tend to wear more pins as they get older. Personally I would wear it as a hair ornament, like a barrette.