Antique 9ct gold and clear stone horseshoe bar brooch, gorgeous petite equestrian pin, yellow and rose gold hues

Adorable antique equestrian tie pin / bar brooch in 9ct gold with the bar section having a subtle rose gold hue, featuring a horseshoe embellished with what I assume is a clear paste stone (though untested). It is 1.5 inches in length and weighs less than 1 gram and fastens with a simple C hook clasp for the pin on the reverse. The brooch is in good vintage condition. - please examine photos carefully for minor signs of ageing.