For your consideration is this lovely marcasite butterfly pin. He has nice openwork and a genuine garnet body. I do believe his eyes are rubies but I am not a jeweler. He has a worn 925 mark and a great patina.
The pin measures 1 and 3/8 inches by 1 inch.
It is in excellent functioning condition other than a minor bend in the pin back. This could be straightened but affects nothing.