Welded Steel, small semi precious stone, wire and thread.Thank You SO for the DD on this and all the wonderful comments!!You all Rock!So I want to answer all your questions:Yes, I did weld this myself. It was about 2 1/2 feet tall. The disks were scrap steel I dumpster scored and those shapes inspired the larger one, which then inspired the cosmic theme. The balance was a challenging achievement as the solid steel disks half an inch thick are Very heavy. The stones, wire and thread hanging took me about 6 hours, the whole piece took about 10 hours of labor.Note of interest, this piece was featured in my graduation exhibition this last June.I think it is awesome how so many of you see the spacial relationship to the many orders of the universe, atomic, chemical, biological and galacticThanks again Everyone! <3