Sterling Silver Round Blue Topaz with Long Hanging Chain & Round Blue Topaz Necklace. This piece would be fabulous for any gathering. This gorgeous necklace will stand out anywhere and give a very elegant and chic look to your outfit. You can wear it to work or even to the next big social event. This necklace is 16" long plus an extra 2" for adjustment. It also has a lobster clasp as the backing for closure.