Antique Cairngorm Brooch

For your consideration, antique Cairngorm bar pin, circa 1910-1930, made out of gold tone metal ( most likely brass and pinchbeck) features a beautiful faceted domed citrine glass, the pin closes on a long C-clasp, overall in great antique condition with some normal expected aging signs, as seen in the photos, the clasp holds securely, from a non-smoking environment. Measurements: 5.7 x 3.5 cm