Transparent aluminum exists. It is called sapphire. Sapphire is the crystalline form of aluminum oxide. If you recall, Apple was thinking of using it for the touch screen face of the iphone.
On Fri, 9 Sep 2016, Peter Cetinski wrote:
Ah yes, but can you make in sheets 60 feet by 10 feet by 1 inch thick and withstand the pressure of 18,000 cu ft of water? :)
Not right now. Stuck on an "Error 53"