Graduated riviere necklace with alternating crimped collet set diamonds and trefoil diamond links with detachable pendant featuring a Pear cut diamond weighing app. 1.50ct. The necklace is set with a combination of Old European, Old Mine, Oval, Single, Rose cut and Pear cut diamonds, all weighing app. 20.00ctw. (including the 1.50ct. Pear), fashioned in silver topped 14k gold. Circa 1860. Necklace length 16 1/4 inches. Pendant length 1 1/2 inches.