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Watches are available in all styles, budgets and qualities, but when you invest in a quality watch, there are usually two types of crystal on offer, sapphire or mineral. If you think about it, every time you look at the time on your watch, you are looking at that crystal, so it makes sense to choose a watch with the best option you can, but what is that?
When talking about mineral crystal vs sapphire crystal watch choices, first we need to know what each is.
Sapphire Crystal is one of the hardest substances known, with a hardness Mohs of 9, just one less than diamond. That hardness and shatter resistance is why this is the crystal of choice for luxury watches, as it provides high levels of scratch resistance and superb clarity. It can also be polished to remove minor scratches and restore the original finish.
However, there are downsides, if it does get scratched or damaged, it is expensive to replace, and it has a lower strength than mineral crystal, making it more likely to break in comparison.
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Mineral crystal begins as a glass crystal, and it is then heat and chemical treated to make it scratch resistant. In comparison with sapphire crystal it is much less expensive, and it is stronger so less likely to crack and break.
However, there are downsides, if scratched, it cannot be polished to remove the problem like sapphire crystal, the entire thing needs replacing, and it is not shatterproof either.
If you don't know which you have, there are easy ways to decide on mineral crystal vs sapphire crystal watch construction, and you don't need professional tools to do so. Simply place the watch on a flat surface and let a drop of water fall onto the crystal. If the drop pulls together like a ball, then the crystal is sapphire, if it spreads to form a thin, flat layer, then the crystal is mineral.
You can also check using a stainless-steel knife or screwdriver, they won't scratch sapphire, but will scratch mineral crystal.
