Just Hand Made Flower Beautiful!! 16 Karat Yellow Gold (tested) "Dogwood" Flower Pin/Pendant. E'MAIL EN RONDE BOSSE ENAMEL Beautifully muted orange-pink, yellow-green & gray colors. One (1) Old Mine Cut Diamond measuring 3.50 m.m. avg.. Diamond is Colorless, VS in Clarity. Diamond weighs aprox. 0.22 carat. Flower measures 1 1/4 " in diameter. Rounded "C" catch for pin and moveable (goes up & down) 5.00 m.m. ring for chain. Did not find any Hallmarks on piece. Pin/Pendant weighs 9.92 grams. Excellent condition. Circa: 1895 - 1910 Art Nouveau era Wear commensurate with age and use. Émail en Ronde Bosse Enamel This style of enamel become very popular during the Art Nouveau period, although it was invented much earlier. While all the other enameling techniques we’ve talked about are done a flat base, the émail en ronde bosse style is applied to 3-dimensional shapes. Before applying the enamel, a gum or glue to painted onto the surface. The enamel adheres to this base layer and when the enamel is heated the gum or glue melts away, while the enamel remains intact.