Emerald City RingAbout the Piece Hand cast recycled brass ring. Longest facet spans 1 5 8", 1 mm band thickness, 11 mm band width. About the Artist K LLER COLLECTION is based in the Hudson Valley and run by chief creative officer and co founder Katie deGuzman. Katie graduated from Parsons School of Design in New York City in 2002, where she studied furniture design. After graduating, she progressed into the jewelry industry designing for Alexis Bittar, Justin Giunta