Apple Watch's Sapphire Crystal Display Evaluated With Diamond Tester

YouTube channel Unbox Therapy has shared a new video that tests the stainless steel Apple Watch with a basic diamond tester to determine if it actually has a sapphire crystal display like many regular mechanical watches. The video also tests the Apple Watch Sport, LG G Watch R, iPhone 6 and a Tissot watch that is verified to have a sapphire crystal display.

applewatchunboxtherapy
The results of the test confirm that the Apple Watch does have a sapphire crystal display as advertised, with the diamond tester recognizing the thermal conductivity of the scratch-resistant material. The verified Tissot watch also displays a reading on the meter, while the Apple Watch Sport, LG G Watch R and iPhone 6 do not yield any results because all three devices have traditional or ion-strengthened glass displays.


Sapphire crystal is a harder and more scratch resistant material than traditional glass, which is why Apple chose it for the more expensive Apple Watch and Apple Watch Edition display and lenses of the heart rate sensor. Apple cut the sapphire crystal with a diamond-encrusted wire to allow for a precise fit and polished it with diamond-covered pellets for a smooth and glossy finish.

"Sapphire is the second-hardest transparent substance after diamond," reads the Apple Watch materials page. "That’s why we chose it to cover the Apple Watch and Apple Watch Edition faces, and to make the lenses of the heart rate sensor. Our sapphire crystal comes from the highest-quality boules. Only the purest, clearest, and strongest sapphire crystal is harvested. To ensure a precise fit for the case, the crystal is cut using a diamond-encrusted wire. To make room for an integrated antenna, a tiny groove is laser-ablated around its perimeter. And to create the smoothest possible finish, the crystal is polished with diamond-covered pellets."

Apple Watch has been put through a variety of tests since it was released last week, giving users an idea of how the wrist-worn device manages based on both normal and unrealistic usage. CNET shared an Apple Watch torture test on Friday that, among other things, involved submerging the watch in hot water and pouring ketchup and maple syrup on it, while another video took the Apple Watch into the shower and swimming pool as part of a waterproof test.

Related Roundup: Apple Watch Series 6
Buyer's Guide: Apple Watch (Neutral)

Top Rated Comments

OllyW Avatar
78 months ago
I don't think there was ever any doubt about Apple using real sapphire crystal displays. :confused:
Score: 61 Votes (Like | Disagree)
arubinst Avatar
78 months ago
So... was anyone expecting a different outcome?

It's not like Apple is going to sell something else and label it as sapphire :rolleyes:
Score: 28 Votes (Like | Disagree)
Patriot24 Avatar
78 months ago
I think the Unbox Therapy guy is nice and knows his stuff, but my god does he take forever to get to the point in all of his videos. This one in particular could've been 30 seconds.

"Oh look, it really is Sapphire." ROLL CREDITS.
Score: 27 Votes (Like | Disagree)
kdarling Avatar
78 months ago
I don't think there was ever any doubt about Apple using real sapphire crystal displays. :confused:
No kidding! :rolleyes:

How about testing something that we don't know yet. Like:

- What's the battery size in the 42mm????

- How long does a watch go if you put it into Reserve Mode at 100% battery?

- Is there a way to fool the wrist detection and move the watch to another arm?

- Heck, what if you just put a piece of white tape (or a band-aid) under the watch? Does this allow the owner to wear it looser?

- I.e. Is the detection looking for a pulse? And if so, is that only every ten minutes?


- etc
Score: 13 Votes (Like | Disagree)
DavidTheExpert Avatar
78 months ago
I would have gone with the stainless steel model for the sapphire display if only there were more color options. I went with sport because I liked the space gray color better. The space black stainless steel was nice, but it only comes with the link bracelet putting the minimum price at a thousand dollars. Eff that.
Score: 13 Votes (Like | Disagree)
realeric Avatar
78 months ago
Don't feed the troll(=Unbox Therapy).
Score: 11 Votes (Like | Disagree)

Top Stories

samsung experience 1

Samsung's 'iTest' Lets You Try a Galaxy Device on Your iPhone

Thursday April 8, 2021 12:42 pm PDT by
Samsung has launched "iTest," an interactive website experience that's designed to allow iPhone users to test out Android on a Galaxy device, or "sample the other side," as Samsung puts it. Subscribe to the MacRumors YouTube channel for more videos. The iTest website is being advertised in New Zealand, according to a MacRumors reader who came across the feature. Visiting the iTest website on...
pixel watch prosser leak

Google Pixel Watch Allegedly Leaks with Circular Design, Rumored to Launch in October

Monday April 12, 2021 2:49 am PDT by
Renders of Google's first smartwatch, codenamed "Rohan," have been shared by Jon Prosser, showing that Google plans to adopt a circular design for its flagship wearable watch. Prosser shared the renders in an episode of his YouTube show "Front Page Tech," in which he claims they were made based on marketing material he had seen from a source within Google. The renders show that the Pixel...
AppleTV and HomePod Feature

Bloomberg: Apple Working on New Apple TV With Integrated HomePod Speaker and FaceTime Camera

Monday April 12, 2021 3:32 am PDT by
Apple is working on a combined Apple TV with HomePod speaker that has a camera for video calls through a connected television set, according to Bloomberg's Mark Gurman. From the report: The company is working on a product that would combine an Apple TV set-top box with a HomePod speaker and include a camera for video conferencing through a connected TV and other smart-home functions,...
nba tracking prompt orange

Two-Thirds of iPhone Users Expected to Block Ad Tracking

Friday April 9, 2021 7:19 am PDT by
As many as 68 percent of iPhone users are expected to deny advertisers permission to track them thanks to Apple's App Tracking Transparency feature, in what is beginning to look like a significant blow to the advertising industry (via AdWeek). With the launch of iOS 14.5, apps will have to receive explicit user permission before accessing an iPhone's advertising identifier or IDFA, which is...
fake airpods 3

Counterfeit 'AirPods 3' Hit the Market Prior to Official Announcement

Friday April 9, 2021 2:45 am PDT by
Apple is expected to launch the third iteration of AirPods in the third quarter of this year. Rumors and reports suggest the new AirPods will feature an updated design more in line with the AirPods Pro, but lacking in "Pro" features such as active noise cancellation. Despite AirPods 3 not yet being officially announced by Apple, counterfeit products of the unreleased earbuds have already hit ...
Top Stories 56 Feature

Top Stories: 'Find My' Expansion, iPhone 13 Pro Mockup, Largest-Ever iMac?

Saturday April 10, 2021 6:00 am PDT by
Apple's AirTags may still be nowhere to be seen nearly two years after signs of them were first discovered, but Apple this week launched its Find My network accessory program that will let third-party devices integrate with the Find My app on Apple's platforms to make it easy to keep track of your items. This week also saw fresh rumors about the upcoming "iPhone 13" and new iMacs, while...
ehric

iPhone 12 Mini Missing From Top 5 Best Selling Smartphone List of January 2021

Friday April 9, 2021 4:58 am PDT by
According to market data compiled by Counterpoint Research, Apple's smallest iPhone since the 2016 iPhone SE, the iPhone 12 mini, struggled to obtain a spot in the top five list of best-selling smartphones in January of this year. According to the market data, the iPhone 12 mini came in eighth place for the best-selling smartphone worldwide in the first month of the year. However, the iPhone ...
sonny 2021 ipad mini pro dummies

Leaked Dummy Units Show iPad Mini 6 With Thick Bezels and Home Button, New iPad Pro Models

Thursday April 8, 2021 2:11 am PDT by
Rumors suggest Apple will release refreshed versions of the iPad mini and iPad Pro models in the first half of this year, potentially as soon as this month, and a new leak today has provided us with a possible preview of what to expect in terms of the devices' overall design and camera prospects. Tech leaker and Apple blogger Sonny Dickson this morning shared images on Twitter showing dummy ...
Google maps feaure green

Google Maps App for iOS Finally Updated After Four Months

Monday April 12, 2021 10:03 am PDT by
Following the completed rollout of App Privacy labels for its App Store apps, Google today updated the Google Maps app for the first time in four months. Apple in December began requiring all new app submissions and app updates to include App Privacy labels, detailing the data that is collected by the app so consumers know what they're sharing. Google didn't begin implementing App Privacy ...
epic iap feature 3

Tim Cook Says App Store Would Become a 'Flea Market' if Third-Party Payment Systems Were Allowed

Monday April 12, 2021 9:41 am PDT by
In a recent interview with the Toronto Star, Apple CEO Tim Cook spoke about a wide variety of topics, ranging from App Tracking Transparency to Apple's ongoing legal battle over App Store policies with Fortnite creator Epic Games. Notably, Cook said that Epic Games' desire for Apple to let developers offer their own payment systems in apps "would make the App Store a flea market":At the...