From an Avid Hat Pin CollectorLot of 4 hat Pins.May be used for collar of blazer jacket.In first picture starting with left pin:Natural Moonstone11.6 X 8.3mmEdwardian Square9.2 X 9.6mm Natural Quartz17 X 8mmCameo12.9 X 19mmall 4 have been acid test 14kt gold 8.9 grams.Excellent made