Sapphire glass grade ?

[Techno]

Is there different grade of sapphire glass?
We find them in $1k watch and to the extend of 20k-50k
Apple phone also use sapphire glass

Is the higher range watches uses tougher sapphire glass and almost scratch proof?

[Soulspawn]

I'm not much of an expert here, but i believe there is a difference in quality and grades.

For example, Christopher wards offers a Museum grade glass for some watches, which many have said makes a huge difference in the overall quality of the watch.

[Techno]

Originally Posted by Soulspawn

I'm not much of an expert here, but i believe there is a difference in quality and grades.

For example, Christopher wards offers a Museum grade glass for some watches, which many have said makes a huge difference in the overall quality of the watch.

i believe it too but most use the general terms "Sapphire crystal glass"
nothing specific in details


could the budget range using some thinner glass or less polish etc?

[locutus49]

iPhones do NOT use sapphire except for the camera lens, I believe.

[Xenophon]

I wouldn't have thought there was a difference. It's all trigonal aluminium oxide, quite easy to produce

[SearChart]

This is the first time I hear about this, I thought they were all pretty much the same. The finishing quality will of course differ, as will the quality of AR coating.

[tom2517]

Originally Posted by SearChart

This is the first time I hear about this, I thought they were all pretty much the same. The finishing quality will of course differ, as will the quality of AR coating.

Yep, that's what I understand as well, only the cut and finishing quality differ. When I went to Urwerk HW in Geneva, they said their complicate shaped sapphire glass was cut and finished in Japan, not that the glass is any special, but the Japanese company was the best at cutting and finishing unusual shaped sapphire glass.

[GradyPhilpott]

Sapphire is sapphire, natural or lab-created.

There may be differences in thickness or other variables, but I don't know about that, except that we know that Rolex at least uses different thicknesses for different depth ratings.

I believe that when you see sapphire glass used, the glass is a synonym for crystal.

Apple uses the term "sapphire crystal glass," which is probably a marketing term.

I would also guess that the term glass suggests the shape of the sapphire to distinguish between that and a sapphire stone or jewel.