Solid 18K gold Madeira citrine natural diamond screw back earrings

This is an absolutely gorgeous pair of Madeira citrine natural diamond solid 18K gold screw back earrings. The gemstones are vey large and measure 9.80 x 8.33 millimeters, total weight of 11.0 carats for both. They are burnt orange in color, with one slightly lighter than the other as you would expect from natural gemstones. The diamonds test positive with the diamond selector II machine. They weigh 4.9 grams and are stamped 18K on their sides. In excellent vintage condition.