Arena Ring from H. Stern London blue topaz and diamonds 0.59ct 18K white gold

Cocktail ring in 18K white gold from H. Stern, model Arena ring, with a London blue topaz and 18 brilliant-cut diamonds weighing 0.59 Carat in quality G VS-SI. The ring has a weight of 9.05 grams. The shank width is 2.90 millimetres and the height 3.54 millimetres.