I was wondering why my Ultraglass 9h+ Terminator Super Plus-whatever and all other 'prenium' screen protectors were cracking and getting scratched-up so easily, after all, on MOHS scale only a diamond has hardness higher than 9H and, since I safely assuming that the "9H" moniker was not a marketing technique for trusting idiots, like me, but an indicator of hardness, I figured my phone's screen was well-protected, until I dropped it from a two-foot height, onto a piece of metal, cracking both the protector and the screen last week. I then did some research and learned that the most hardcore, most premium, highest-priced screen protectors, even those without any magnetron-sputtering surface treatment for reduced reflection or other surface depositions that make them less hard and safe, can only reach a hardness of 6-6.5, in very rare cases 7, which is still a high hardness indication but not nearly as hard or resistant to scratches as a true synthetic sapphire is.
I also learned that all "Sapphire-infused" brands of glass are just regular alumina oxide glass (a3o2)! Turns out, mixing sapphire with aliminooxide glass destroys the rigid lattice required to achieve sapphire's true scratch resistance, which means that it's not possible to infuse anything with sapphire or ever mix the two. So, unless it explicitly and without any asterisks says that it's a 100% lab-grown sapphire then it's not a "Sapphire-infused" (or "Sapphire-adjacent") glass.
From what I can tell, there is not a single screen protector that can come close to the hardness exhibited by Sapphire (and also not a single "true" synthetic sapphire screen protector available for the Samsung S26 Ultra anywhere in the world), simply because it's way too expensive to produce and even those manufacturers that are based out of the US and thus do not abide by the consumer-friendly laws against false-advertisement and claim to sell synthetic sapphire screen protectors, don't actually sell anything made out of synthetic sapphire but rather a higher-hardness Lithium Aluminaoxide (Or Sodalime glass with higher ion exchange) with additional laminating and surface treatment, manufacturing techniques that do make it safer but nowhere near as safe as sapphire, they also reduce screen responsiveness and have many other negative side effects as a result of their multi-layer construction.
Needless to say im very disappointed, just wanted to share it if, like me, you are puzzled in terms of why the screen protector you spent $40+ purchasing doesn't last and doesn't protect your phone nearly as well as you hoped it would.