This biomorphic pin c. 1950’s is made of mixed metals: sterling silver and copper, like many of Popowski’s pieces. It has an inlay of crushed stone (azurmalachite). The pin has the top layer (described above), sitting on a layer (of just over 1/8”) of obsidian backed by a layer of sterling. It is signed “popowski,” (maker’s mark), “STERLING HECHO EN MEXICO D.F. 0.925” in a circle with a stylized “M” in the shape of a heart encompassing “AE” – see pictures) and an eagle “23” mark. It measures 2 1/2” x 1 5/8” (x 3/16”) and is in excellent condition. Stella Popowski is an extremely talented, versatile artist. She lived all over the world and settled in Mexico for about 20 years (early 40’s-60’s). She continues to work with metal (as well as many other materials), but, is mostly painting.