Types of watch glass - learn the differences between mineral, sapphire and acrylic
Choosing the right glass in a watch is more than just a matter of aesthetics - it's a decision that affects the durability, comfort and daily use of the timepiece. Whether you're considering mineral, sapphire or acrylic glass, it's worth learning about their strengths and weaknesses in order to make an informed choice - and not just "by eye."
Mineral or sapphire? Find out which watch glass will survive everyday life unscathed
On a daily basis, you don't pay attention to how many times your watch snags on something on the run - a doorknob, a table, a backpack, a corner of a cabinet. And then suddenly comes that moment when you look at the dial and see.... a scratch. And here comes the key question: mineral or sapphire glass? If you choose the wrong one, then even the most expensive mechanism and the most beautiful strap won't help - the dial stops looking like new, and the watch loses all its charm.
Mineral glass is definitely more flexible and therefore does not break so easily when falling. It is able to cushion some of the force, which is why it is often used in everyday watches. But unfortunately - this also means that it is more prone to scratches. Sapphire glass, on the other hand, is almost impossible to scratch, but for that it is more fragile - a stronger impact can shatter it. Everyday use, then, is a balancing act: if you move around a lot, play sports, constantly hook your hand on something - it may be better to bet on hardened mineral glass. If, on the other hand, you want something classic, worn occasionally and you care about looking perfect for years - sapphire glass will be a hit.
There's no one answer for everyone - the types of watch glasses respond to different needs and lifestyles. So if you're wondering which one will survive your daily life, first look at what situations you actually wear the watch in and what you expect from it.
The Roamer Searock Automatic 210633 49 25 20 is an elegant Swiss watch with automatic movement, sapphire crystal glass and 10 ATM water resistance, which impresses with a sophisticated combination of steel and rose gold.
Don't be fooled by the shine - here's what really counts in a watch glass
At first glance, most glasses look similar - smooth, shiny, clear. But this is where the biggest pitfall lies. Because although you may think that every glass in a watch works the same, the reality is quite different. Hardness, temperature resistance, polishability and even weight - all these make a difference. And more than it might seem at first glance.
The Mohs scale is something worth knowing, even if you are not a watch freak, and it will help you understand why some watches look like new after years, while others have visible scratches after just a few weeks. Mineral glass falls somewhere in the middle - not too hard, not too soft. Sapphire glass is a nine on this scale - second only to diamond. But the higher the hardness, the lower the resistance to breakage. In contrast, the acrylic glass in the watch has a hardness of barely 1-2, but can withstand a solid impact without any damage.
So, if you care about more than just a shiny effect under the light, look deeper. The types of glasses in watches differ more than the gloss shows. It is worth taking a moment not to be tempted only by the appearance - what counts is what is "inside", or rather - what is outside, but invisible at first glance.
CASIO G-SHOCK Bluetooth Step Tracker GBD-200-2ER is a durable sports watch with pedometer function and scratch-resistant mineral glass, perfect for daily challenges and an active lifestyle.
Acrylic glass – plastic failure or brilliant choice for active people?
Many people dismiss acrylic right off the bat because it sounds cheap and... plastic-y. What a shame, because acrylic glass in a watch can really surprise you positively – especially when impact resistance matters to you. We're not talking about luxurious appearance or prestige here, but practical use. Acrylic is a lightweight, flexible material that easily absorbs shock, and instead of cracking, it simply deforms slightly. That's a huge advantage if your watch often lands on the floor, hits the edge of a cabinet, or you wear it while cycling or running.
Yes, it's true – acrylic scratches easily. But unlike sapphire or mineral glass, most scratches can simply be... polished out. All you need is the right compound and a bit of patience. What's more, hesalite crystals are often found even in cult models, like Omega's Moonwatch, where they're deliberately kept to preserve the historical character.
It's the perfect option for sports watches or for people who simply value practicality over flashiness. Not every model needs to look like an exhibit in a jewelry showcase – sometimes what matters is that the watch simply endures more than it appears to. So if you're looking for something lightweight, shock-resistant, and hassle-free to maintain – acrylic is definitely not a "plastic failure."
Casio Vintage F-91WS-7EF is a lightweight and stylish watch in a semi-transparent version with classic retro design, equipped with digital display, alarm and stopwatch functions, and acrylic glass.
Before you buy a new watch – see which glass best fits your lifestyle
A watch is more than just a tool for checking time. It's an element of your style, and often a daily companion in everything you do. That's why before you decide on a specific model, it's worth looking not only at the movement, but also at... the glass. What glass in a watch will be best? It mainly depends on you and your lifestyle.
If you work at a desk every day, your risk of damaging the watch is lower. In such a situation, sapphire glass can be ideal – elegant, transparent, scratch-resistant. On the other hand, if you travel frequently, work physically, or simply tend to be "hands-on everywhere," mineral glass will work better – cheaper, but more flexible and less prone to cracking. Or maybe you're looking for a watch for a child or something for workouts? Then acrylic glass will be a safe, flexible, and practical solution.
It's not worth buying a watch with your eyes only. Think about how you wear it, in what situations, and what's most important to you – durability, appearance, or maybe easy maintenance? Types of glass in watches aren't just technical differences – they're decisions that can affect daily comfort of use. So don't be afraid to ask questions, check, and choose consciously. In the online watch store WestWatches, you'll find a wide selection of models with different types of glass – from mineral, through sapphire, to hardened – matched to different needs, styles, and budgets.
Mohs scale in practice – what can scratch your glass and how to protect against it
If you want to really understand why your watch looks like it's been through a war after a few weeks, while your friend has worn his for two years without a single scratch – you need to know one thing: the Mohs scale. It's precisely what allows you to predict how scratch-resistant your watch glass will be. And although it sounds scientific, in practice it's quite simple.
The Mohs scale is a ten-point ranking of material hardness, where 1 is the softest and 10 is the hardest (diamond). Acrylic glass in a watch ranks very low – only 1–2, so you can scratch it even with your fingernail. Mineral glass scores 4–5 points, which means it can handle a bit more, but can still succumb to sharper objects. Sapphire glass rates a 9 – only diamond or something equally hard can scratch it. And this is exactly why men's and women's watches with such glass look so good even after years.
But be careful – high hardness is one thing, and resistance to shattering is another. Hard materials are brittle, so sapphire glass can crack upon impact, even if it has no scratches on it. So if you tend to bang your hand against everything within reach, hardness isn't the only parameter worth looking at. This is further proof that types of glass in watches have more nuances than they seem.
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