Photo: “The Brimham Rocks are balancing rock formations located on Brimham Moor in North Yorkshire, England. The rocks stand at a height of nearly 30 metres in an area owned by the National Trust which is part of the Nidderdale Area of Outstanding Natural Beauty”. – Wikipedia. (Photo by Tee Time Tony)
Architecture is creativity solidified into a form of building..."the complex or carefully designed structure of something" (Google def #2). NOT necessarily as large as "a building". Here is a half-circle of stones built to rise in an arch at the still water's edge. The waters reflect it to create a perfect circle, and the stones below the water parallel the form of the stones. Martin Hill Stream Stone Circle, White Beach, New Zealand
Blue Biggs Jasper stone. Blue Biggs Jasper is a silicated volcanic ash. It was formed during a volcanic eruption and is part of a Miocene series of rocks called the John Day Formation, near Biggs, Oregon, USA. It is a decorative stone used for jewellery and trinkets.