Vintage 18K Gold Seashell Urchin Shell Brooch with Diamond Center. This gorgeous 3-dimensional brooch depicts a realistically detailed sea urchin shell in18 karat gold. I believe it dates to the 1960s. The dome is accented with a bright full-cut diamond center gauged at .08 carats. The brooch measures 1 inch in diameter with an approximate 5/8-inch depth. The back was difficult to photograph, but it is marked 18K and with a maker's mark (D in an arrow.)
Condition is excellent. It is a dramatic and commanding piece and quite hefty at 11.75 dwt / 18.27 grams. Just beautiful...for anyone who loves the sea and its treasures!