> I thought they grew the sapphire glass in chunks and then cut it.
They are able to grow the sapphire in big chunks *because* it is crystalline.
An amorphous glass is prepared, heated to a fluid state, and *poured*.
> Maybe I'm confusing things. Maybe the gorilla glass is not 9 on my MOHs hardness scale like sapphire.
Gorilla glass does have a pretty high Mohs # [it is named after German geologist and mineralogist Friedrich Mohs], but probably not as high as sapphire (I haven't found an actual number for it).
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Jim Saklad mailto:jimdoc@icloud.com
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Posted by: Jim Saklad <jimdoc@icloud.com>
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