Crystal melting and annealing process.

[apollonius]

slowly after hosing the thing down. do you watch the videos that you post?

[OutofluckpikerMJK]

Love the safety wear. That polyester/cotton shirt withstands several degrees.

[roadshowautosports]

WOW! That explains all my predictions of the future didn’t pan out!!! My crystal ball is made out of low quality quartz!!!!

[dongmiano]

It's not quartz, it's is glass mostly recycled

[clivedarvhinmontelora]

Block of Asteroid? My first thought was a burning turd 🤣

[Richard_Stephanie]

That guy has an amazing stream. No prostate issues there

[haroldschultz]

It’s not “internal stress”, it’s thermal shock which causes the cracks. Much like what happens when you fill a glass which has been in the freezer with hot water, it cracks on contact with the boiling water. This can happen even with Borosilicate (Pyrex) if it’s cold enough and the water is hot enough.

[weemonkey]

Sorry thats not quartz. It lacks crystalline structure

[randallsmerna]

Quartz is a naturally grown crystalline material. Glass is not. If you melted down quartz and then let it cool, it would no longer be quartz.

[nannesoar]

Holy crap I always thought quartz was only mined that's a huge relief I love some quartz thought we were using it all up😂

[rubikfan]

Not for cracking. It just saves alot of water and infrastructure. Its cheaper to air cool it.

[roberthoffmann]

It's furnace slag. It's the garbage from the bottom of industrial furnaces from power plants and factories.
And slag can contain various levels on NORM, naturally occuring radiological materials. Yes, that red glass orb can be radioactive.

[ruleartist]

That worker has a powerful stream holy shit

[courtofpublicopinion]

I wondered where they mined so much of red rock to make silly balls with. Now it make sense

[Busted.Knuckles.Garage]

Ya if u melt sand you get glass quarts comes from thousands of yrs on compression of

In igneous rocks, quartz forms as magma cools. Like water turning into ice, silicon dioxide will crystallize as it cools. Slow cooling generally allows the crystals to grow larger. Quartz that grows from silica-rich water forms in a similar way.

[Stethacanthus]

How much does one of those giant blocks cost? That has to be a dream for many a sculptor.

[DALEPOWELL-sl]

IS THAT WHERE THEY CAME UP WITH THE SAYING, YOU HAVEN'T GOT THE BALLS?😊

[w.heitzman]

Let the grass fire heat it up, where is all the clowns claiming grass fires melt cars into puddles of aluminum

[edwardrmurrow]

That's how they make the educational toy Bag O' Glass.

[jarretwilson]

They don't cool it with water because it causes cracks, proceeds to show a video of a guy spraying them down with a hose