posted on Mar, 13 2009 @ 08:40 PM
Originally posted by OZtracized
Sapphire (corundum) is a form of Aluminium Oxide. Also gold can be bashed so thin it becomes transparent. Astronauts visors have a thin film of gold
to reflect radiation but let visible light through (I believe).
It's a thin film of gold on a glass visor. So it's exactly what a half-silvered mirror is. It's made to block out most visible light and UV, but
still be transparent enough to see what needs to be seen. It does pretty much what a pair of good sunglasses does, only presumably better.
Aluminum oxide/corundum doesn't really count as a transparent metal, because it isn't a metal, it's an oxide. It's more of a ceramic. like you
said, it's sapphire. It's hard and strong, but it's not ductile or malleable or conductive.
I'm fairly sure there aren't any true transparent metals.