It depends on the type of gown you are wearing- party or marriage. According to the kind of dress, your accessories vary. Suppose if you are wearing a strapless dress, then chokers or short necklaces will work. Whereas, if you are sweetheart necklines dress, then bold and short necklaces will go to complete your look. But if you are wearing V-neck or deep plunge dress, then a dangling pendant or gold necklace will go perfectly with your look. So, if you wish to purchase a jewellery set for your gown, then consider buying it from popular brands. And they are  Swarovski, Tiffany & Co., Pandora, Sasha, Agatha, Marli, Emporio Armani, The Jewels Jar, David Yurman, Alex and Ani, Bil Arabi, Baby Fitaihi, Michael Kors, Gucci, Aldo, Buckley London, ISTANA LIALI., and so much more.