ORNO was a Artisan Coop founded in Warsaw, Poland in 1949. We don't know much about the coop except that it was a leader in Modernist design in the 1950's and 1960's. This is an exceptional over the top huge Modernist handmade ring in silver and rose quartz. The rose quartz measures about 3/4" in diameter and is domed. With the setting, the ring measures about 1" in diameter. The ring rises a very high almost 7/8" above the finger. There is an undulating under/over design on the raised setting. The ring is a sizable 7. It is marked ORNO and 2 marks of ladies facing right indicating Poland and 800 silver.It is in excellent vintage condition. Right up there with any of the Modernist designs.