I found mention of this on another forum. Some guy has one of these and, according to him, the cover supposedly contains 1/2 pound of 22K gold thread. He said that the mattress cost $25,000 4 years ago. He wants to recover the gold. I'll probably end up answering him. In my estimation, the cover would have to be incinerated to white ash. Then the ash could be flux melted or possibly treated directly with AR.
http://www.magniflex.us/gold.html
The thread:
http://www.finishing.com/571/11.shtml
http://www.magniflex.us/gold.html
The thread:
http://www.finishing.com/571/11.shtml