It isn¡t but not so strange, even in Nature exist Transparent Aluminium, called Saphires and Rubies. It's called transparent Metal, because of it's atomic structure cristaline, not amorph like normal cristal of an Window. Metal, also Aluminium has a cristaline structure.
"Wealth beyond the dreams of avarice!" I love how my guys stood at each of the factory owner's shoulders. A southerner and a Scotsman, applying charm, unstoppable combo. Super good news IRL, thanks for feeding the craving for good news crossed over with nerd news.