Created in Barcelona Spain by the artist goldsmith Octavio Sarda Palau, back in the 1970. This unusual geometric ring has been made with Bauhaus parameters of the golden rule proportions in mind. It was carefully crafted as a cushion in solid yellow Gold of 18 karats with high polished finish. Coral: Mount in a bezel setting, with 1 fancy cabochon cut of natural coral, with a weight of about 3.50 carats. Weight: 6.6 Grams, (4.23 Dwt). Size: 6 sizeable. Sizing beads, a collar or a spring sizer can be added to accommodate a smaller finger, but the ring’s size cannot be increased more that two sizes. Measurements: 8.5 mm by 21 mm (0.34 x 0.83 Inches) and raise 6 mm over the finger. Hallmarks: Stamped in the outside with the maker's mark 434B, the Gold assay mark 18kt and the city of origin B for Barcelona in Spain Very good conditions. Upon Request, Auction House may provide ring resizing or/and appraisal. This will carry an additional cost. Appraisals are made by our in house GIA certified Gemologist.