Total drop of centrepiece is 35mm. Total length of chain 17 1/4 inches. Opals measure 6.2mm in diameter and 4.5mm in diameter and are nice deep cabochons. The item "Edwardian Semi Black Opal & Pearl 9ct Yellow Gold Negligee Necklace" is in sale since Monday, September 17, 2018.This item is in the category "Jewellery & Watches\Vintage & Antique Jewellery\Vintage Fine Jewellery\Edwardian (1901-1910)". The seller is "vintagegems2011" and is located in Lincolnshire. This item can be shipped worldwide.