Amazing Modernist Art Studio Signed A. Riggione. A Sterling Gemstone Brooch 1980's with Saphire, Ruby and Aquamarine set stones. 16.97 Grams Sterling. 2" W x1.5" H. The Pin fixture is not entirely square but this seems to be a soldering original slide and very secure. Amazing Studio Art Movement work!. Addie Riggione. Angelina De Francesco Riggione is a Pennsylvania Jewelry Artist who was a graduate of the Tyler School of Art, Temple University. Ms. Riggione was a Gallery Owner and Curator at "Works Studio" between1984-1994 in New Hope PA.