Annoyingly, there's no description of the composition of the glass nor the manufacturing process, it could be transparent rubber for we know.

"The researchers explained that the limits of LionGlass have not yet been found, because they reached the maximum load allowed by the indentation equipment."

Equally vague and obscure. (Surely they could use a guesstimate, when one's test equipment runs out of range there are usually workarounds. Although not as accurate, they at least provide a ballpark measurement.)

Also, the article mentions only crack resistance but nothing about scratch resistance (they're not necessarily the same). I wonder why.