I first saw Kate Spade's Give it A Swirl 3-Strand Necklace and loved it. I figured there would be some other similar styles around so I took a look online.
Kate Spade New York Give It A Swirl 3-Strand Necklace $148.00
If you wanted a more expensive version (but oh isn't it beautiful!):
Oscar de la Renta Multi-Row Graduated Beaded Necklace $890.00
A less expensive option:
Banana Republic Bold Bead Necklace $69.50