New York’s Forbes Gallery is celebrating imaginative jewelry design with Variations on a Theme: 25 Years of Design from the AJDC, an exhibition featuring 40 new jewelry pieces that runs through February 22. Each one-of-a-kind piece was created by an artist from the American Jewelry Design Council to reflect the theme of one of the council’s annual Design Projects, such as the German jewelry designer Jennifer Rabe Morin’s sterling-silver Ice Chimes Earrings inspired by the cracking of ice ($6,000). The earrings…