Long Black Sequin Halter Prom Dress: Morgan 10213Sleek and sparkly, this long black sequin halter prom dress by Morgan & Co. is ready to wow the crowd. Fully sequined from the high neckline to the hem, this junior size long black formal dress shimmers with every move you make at prom, galas, and other black tie events. The long black sequin prom gown has a high neckline with thin bands that tie at the back of the neck before hanging down over the open back. The long skirt opens in a side slit before