Claudio Silvestrin's handmade Le Sabbie vases and bowls are defined by distinct sections of transparent and opaque aquamarine as well as satin-and-engraved ivory glass. These opposing optic elements, along with smooth-as-silk contours, create an unmistakable aesthetic. 41 Madison Avenue, 7th Floor, New York, NY 10010; 866-696-9640; venini.com.