Whatzit?

[Rufus T. Firefly]

Looks vaguely like one of those crystalline bits that's been impacted by an electron beam.

[webenda]

Looks vaguely like one of those crystalline bits that's been impacted by an electron beam.

Like laser-wakefield-accelerated electron bunches used for time-resolved electron diffraction measurements of the structural dynamics of single-crystal silicon nano-membranes pumped by an ultrafast laser pulse?

If so... no.

[Rufus T. Firefly]

Looks vaguely like one of those crystalline bits that's been impacted by an electron beam.

Like laser-wakefield-accelerated electron bunches used for time-resolved electron diffraction measurements of the structural dynamics of single-crystal silicon nano-membranes pumped by an ultrafast laser pulse?

If so... no.

Okay.

[webenda]

Molybdenite?

No. This Whatzit is more transparent than molybdenite.

[chuck]

OK, broken smart phone screen protector. Man made sapphire?

[Rufus T. Firefly]

Not sure that I've ever seen one of those.......

[chuck]

Supposed to protect the screen from damage. They don't fail too often but when they do, the shatter spectacularly. Sort of like that Corelle dinner wear that was extremely tough until it shattered like a fragmentation bomb producing insane amounts of small very sharp shards of glass. The screen protectors don't do that but the insane spider webs make the phone unreadable. In theory you should be able to replace the protector.

[robert.]

I replace mine every month and that's about two weeks to late. The original iphone protector made it 2 years. Before it broke. Cheap $4.99 versions don't last at all. Most of the cracking comes from removing it. Mine will cut 2-3 small cracks ( these make it hard to answer the phone or use the keypad. When you remove them they flex and splinter.

[chuck]

I've had better luck with the silicone phone protectors. Protect you from most drops unless the phone is "face down" when it hits.

[webenda]

OK, broken smart phone screen protector. Man made sapphire?

Yes, no.
It is ordinary glass that has been created to have great compressive strength, in the same manor as a Prince Rupert Drop, except Corning Glass uses an ion exchange process to create the internal tension. Corning claims you can fold it like paper. Wrong! There is a limit to how far you can bend it. I didn't even come close to making a glass airplane.

[robert.]

Your glass did not break in two. That makes Corning correct.

[Rufus T. Firefly]

Yet another good reason for my keeping my flip phones,

[HONDO74]

[chuck]

No image, just the icon for a broken link to an image.

[HONDO74]

No image, just the icon for a broken link to an image.

The picture came from here.
Incredible Historical Photos They Won’t Show In School
https://livestly.com/schools-college-wo ... EWS|c&ss=1

Picture #24 in the slideshow