It’s the cooling of silica (really, any material) that makes it a glass, and even then, transparency in the visual wavelength is not automatically certain.
Good example. Obsidian is apparently 70% silica. Iron is apparently what makes it black in color. If it’s thin enough, it is translucent.
If you cool pure silica slowly enough, with impurities to cause seeding, you will get tons of crystals, not a single glass, that won’t be transparent.
3090 degrees is above its boiling point (which is 2950 degrees).
So it doesn’t become “clear”, it literally vaporises.
You are talking Celsius while the meme is likely referring to F (you can tell because Obama)
When will the US finally use the metric system 😮💨
Anti Commercial AI thingy
Glassblowers: thanks Obama
I wonder how they figured that out
Did molten lava touch sand and then they were like 😳
Maybe tektites? Natural glass formed when lightning meteorites strikes sand. I only remember the name because they share it with the jumpy spiders from Zelda
When lightning strikes sand it creates fulgerites.
Tektites are formed when meteorites strike.
Oh look there’s a whole Wikipedia page on it
https://en.wikipedia.org/wiki/History_of_glass
Possibly an accidental byproduct of metal working
Jules Verne wrote about this in one of his novels. The mysterious island, iirc.
I think people just experimented a lot. Try enough random things, you’re bound to come across cool chemistry every once in a while. If they figured out how to make really hot fire, that opens the path to “let’s try making various things really hot to see what happens”.
Of course, I know basically nothing about [pre]history or human development so I could be way off
well this is my favorite post.
