Case Studies Open Building Open system (open building) PPTX Open Building 10K Yellow Gold Fashion Ring Open Building versus Architecture or Open Building as Architecture IM John_Habraken Open Building. Style: Fashion Brand: N A Size: 6 Condition: Good Material: Yellow Gold Gold Karat: 10K Total Weight: 4. 3g This unique item is available for sale both online and in our retail store showcase. If you love it, complete your purchase now so you don't miss out. Over a million visitors a year shop our retail store, and great finds sell fast!