The watch crystal is the glass that covers the face of the watch. There are three types of crystals found in the market: plexi-glass, lowly glass or mineral glass and artificial sapphire.
The plexi-glass is a transparent, lightweight plastic. This is the cheapest version of crystal from the three. The lowly glass (mineral glass) is the one used for windows. And the artificial sapphire is the most sought after type of glass and it is also the most expensive. It is made by crystallizing aluminum at very high temperatures. Both of the crystals have their advantages and disadvantages. The plexi-glass is the cheapest version but it is the most likely to scratch or even shatter. The mineral glass is very brittle and can break easily. Also, the itsybitsy pieces of glass can work on the interior mechanism. The artificial sapphire is the most resistant of them all and it doesn't scratch easily.
There are specific French words that are used to enumerate watch crystals. The word "lunette" for example means that the glass is round. Other words like bombe, cheve and boule mean that the crystal is concave or dome-shaped.
When buying a watch one can stumble upon descriptions such as anti-reflective or glare-resistant. This of course refers to the way a glass watch has been coated. Watchmakers can use a substance to coat the faces of the crystal. This substance makes it easier to read the time because it lessens the reflections and the stare. This type of crystal can be either a mineral glass or a artificial sapphire. If by any opening you carry on to break the glass it is inescapable that the most expensive to replace will be the artificial sapphire.
There are a lot of things that we have to take into inventory when buying a watch. These are just some of the factors that you have to look at before development a purchase. A watch is an accessory that makes a statement so be careful what you choose.
Seiko
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