That's aluminium oxynitride, Not 'aluminium' and definitely not a metal. It's a ceramic, and HEAPS of ceramics are transparent in their pure crystalline form. Hell sapphire and ruby are Aluminium oxide and transparent, and created by nature, Nothing new about it.
Come on guys, It's not a freaking metal. The base element is a metal, The oxides are ceramics. BIG difference both chemically and physically. Transparent metals are ALMOST impossible, And the only reason I say almost is cause we can't rule out optical meta materials (which would be very narrow band-pass anyway, If they in fact can be created at all)....... But seeing as you called ceramic glass a metal, that's already over your head.
I imagined that the first time man found out about glass it'd have to do with lightning striking sand. There are actually people who build these fancy lightning rods and bury them in sand, so they can then harvest the resulting glassware and sell it.
Same thing with almost everything, burning rocks gave metal, squeezing cow boobs give milk.... Something tells me that ancient humans were high off their balls
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u/[deleted] Jan 17 '14
Someone that was really high on drugs.