Fabulous architectural geometric ring, created in Barcelona Spain by the artist goldsmith Octavio Sarda Palau, back in the 1970. This unusual three dimensional ring has been made with Bauhaus parameters with the golden rule proportions in mind. It was carefully crafted in solid yellow gold of 18 karats with high polished finish. Gemstones: Mount on top with a pair of cubic cut (9 X 9 X 9 mm) of natural blue lapis lazuli. Weight: 13.6 Grams, (8.72 Dwt). Size: 7.5. Measurements: 20 mm by 30 mm by 10 mm (0.79 x 1.18 x 0.39 Inches). Hallmarks: Stamped 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 an appraisal. This will carry an additional cost. Appraisals are made by our in house GIA certified Gemologist.