In this i will show how you can test a Gorilla glass at home.phone restoration video:-
The glass may also (I think it is) be chemically treated and removing that treated layer will degrade it. Any scratch in glass creates a stress point and weakens it. Ignore it. Get it replaced. Try to finger polish it out if only a micro scratch. A inexpensive screen protector like Gorilla IQ Sheild would have prevented this

Corning says that, compared to its previous offerings, Gorilla Glass 3 provides enhanced scratch resistance, reduced scratch visibility, and better retained strength once a scratch

While Gorilla Glass 2 made the glass thinner at the same strength, in Gorilla Glass 3 scratch resistance improves three times resulting in a 40% reduction in visible scratches and a 50% enhancement in retained strength after the glass becomes flawed.
In the application of smartwatches, sapphire glass is a great fit. As an upgrade to the previous Galaxy Watch 4, sapphire is a game changer for the Galaxy Watch 5. Better scratch resistance gives
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gorilla glass 3 scratch test