Measuring app. 4 3/8inches, centering an Emerald measuring appl 4.4 x 4.1 mm, additionally set with forty Old European cut diamonds weighing app. 1.50ctw, with two pearls one measuring app. 3.65mm and one 2.5mm, fashioned in platinum topped 14k gold. Circa 1860. With original box from A. Stowell Boston, MA.