She did the tri-colored diamond "D" bangles which come in white, black and yellow gold, and the popular "Angel Ring".
In case you missed the "America's Got Talent YouTube Special", here's a clip of one of the more interesting performances. Magician, Dan Sperry creeped out the audience with a string of dental floss and a breath mint, but the best part was Howie Mandel's reaction at 0:44 and Sharon's uncontrollable fit of laughter!
Hysterical! Howie is known to have a serious case of mysophobia (fear of germs) and he was not pleased to have that string of magic floss anywhere near him.
Poor Sharon couldn't stop laughing to save her life! But she did look great in her jewels.