18ct Gold Victorian Imperial Topaz Rivière Necklace Set With A Series Of Graduated Round Faceted Cut Topaz, Ranging From 14mm to 9mm. Collet Set With Rope Twist Border. All Joined By Jump Rings, Unmarked, Tests 18ct Length 16 Inches. Together With An Associated 18ct Gold Topaz Drop, Comprising A Hoop Of Five Stones. Gross Weight 58 grams