This stunning antique piece was handcrafted sometime during the Art Deco design period ( 1920-1940 ). The center diamond measures approximately 0.85 carats and is an Old European cut. The center diamond grades I in color, SI1 in clarity. The 18k white gold setting is absolutely immaculate. The setting features extensive floral filigree, milgrain accents, and antique hand engravings. The attention to detail is absolutely incredible. The filigree white gold setting features four small diamond accent stones. This ring is currently a size 8 & 1/2. This ring very well might be the perfect antique filigree piece with so many fine details and being so exemplary of it's spectacular design era.