These vintage 14k gold filled or plated screw backed earrings have AMCO 14K I G.O impressed to the back of the earrings. The brooch has no mark but is part of the set and has the same stone, metal and style to the earring setting, just larger proportions. I wear brooches on Pearl necklaces but brooches are coming back in anyway. The look of the metal from the front and without a loupe does look like real/solid gold with a touch of rose gold hue but it isn’t sold gold. Sorry I’m not 100% positive of what the green stones are but they could possibly be Jasper? The stone within the brooch is 1 inch long by 11/16th “ wide, with the setting it’s 1 and quarter inch long x nearly 1 inch wide and looking at the earring fronts, the stones are 6/16th inch long and 5/16th wide with the mount then it’s 10/16th “ x nearly 9/16th “ wide. These are a classic and well made vintage set.