Apple Watch 7 increased crack resistance also on saphire glass?

[Jochheim]

Hi girls and guys.
Although there are not that many new features that interest me in the 7, the sturdier glass is definitely interesting. However I think it was not really addressed by Apple if this feature is also coming to the Saphire glass. Making it more crack resistant would be a huge win for me as Saphire is more scratch resistant but also more brittle. I don’t think anyone here knows about this at this point but we could use this thread to stay up to date if any information regarding this will surface. So i would appreciate any future insight.

Have a nice day.

 

[wilberforce]

I got the impression that it is more crack-resistant because of an improved shape and possibly greater thickness, not because there is any change in the material:

 

[Jochheim]

Thanks for the reply and I would on one hand argue, that this could mean that also the Saphire edition will be more crackproof. On the other hand - at least with the earlier models - the Saphire screens were a little less vibrant than the ion X versions (because of the Saphire) so this could mean that apple will not increase the thickness of the Saphire glass and thus only use the changed geometry ?

 

[wilberforce]

The Sapphire reflects more because it has a higher refractive index than glass (resulting in a higher proportion of the light reflected at the sapphire/air interface). This will not be altered by changing the thickness, as it happens at the sapphire/air interface.
People like sapphire for jewelry BECAUSE it has a high refractive index and reflects (sparkles) more than glass. Diamond has an even higher refractive index, and reflects even more.
But you are right: we are not 100% sure if the sapphire crystal is changed the same as the glass crystal until it is released.

 

[Luba]

The Sapphire reflects more because it has a higher refractive index than glass (resulting in a higher proportion of the light reflected at the sapphire/air interface). This will not be altered by changing the thickness, as it happens at the sapphire/air interface.
People like sapphire for jewelry BECAUSE it has a high refractive index and reflects (sparkles) more than glass. Diamond has an even higher refractive index, and reflects even more.
But you are right: we are not 100% sure if the sapphire crystal is changed the same as the glass crystal until it is released.

Oh! I thought the increased crack resistance was for all crystals. Sapphire shatters more easily because it's more brittle than glass . . . cracking and shattering probably aren't the same as how Apple is taking about crack resistance.

Interesting that thickness doesn't affect reflectiveness. The reflecting is happening right above the surface in the air?

 

[wilberforce]

Oh! I thought the increased crack resistance was for all crystals.

I think you are right, but the increased crack resistance is because of an improved geometry (see my post with screenshot above), not because they changed the materials in any way.

 

[SoN1NjA]

I got the impression that it is more crack-resistant because of an improved shape and possibly greater thickness, not because there is any change in the material:

View attachment 1838025

Probably like how the 12 phones were like "4x more crack resistant", not because the glass was far superior but just the shape of it. JerryRigEverything discussed it in his video back then