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About Watch Crystals

A watch crystal is a transparent cover that protects the watch face. Coincidently, the word "crystal" is also used to describe the tiny piece of quartz that acts as an oscillator in a quartz watch. These two crystals have nothing to do with each other. The latter is usually called a "quartz crystal" to prevent confusion.

Crystal Composition

Watch crystals are made with three different materials: 1. Plexiglass (a clear, lightweight plastic). 2. Common glass - like that used for windows, and usually referred to as "mineral crystal or Harlex crystal (Seiko)". 3. Synthetic sapphire. Some crystals are made of both mineral and sapphire glass. Seiko, for example, makes some watches with crystals made of mineral glass covered with a layer of synthetic sapphire. Seiko calls this composite material "Sapphlex".

Advantages and disadvantages of materials

Plexiglass is the least expensive. It is also the least prone to shatter and the most prone to scratches. Mineral crystal, even though it has been hardened by a tempering process, is more likely to break than plexiglass. It is also more scratch-resistant. Synthetic sapphire is the most expensive crystal material and the most scratch resistant. Saphhire is also brittle, and shatters more easily than mineral glass or plexiglass.


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Bluedial Watches, is proud to present Seiko Watches, Citizen Watches, Casio Watches, Invicta watches Traser Watches Bulova Watches and more, with over 20,000 watches presented, Bluedial is the Internet's leader in Seiko Watches, Citizen Watches, Casio Watches and Trase H3 WatchesWe show brand Watches like Seiko, Citizen, Casio, Bulova, Invicta Swiss Army, ESQ, D&G, Aquaswiss, Bulova, and more, watches of the highest quality. Buying a watch like Seiko or Citizen is a special occasion and we treat it as such. All watches including Casio Watches, and Swiss Army, there's no wonder Bluedial Watches has outpaced the competition. Bluedial specializes in Seiko watches (including Seiko Velatura and Seiko Sportura, Seiko Chronograph), Citizen watches (including Citizen Eco-Drive watches), Casio watches such as Pathfinder and Atomic watches, Bulova watches (including many diamond Bulova watches), ESQ watches, Invicta watches, ESQ watches, Tissot watches, and Zodiac, watches. We are sure you will enjoy your shopping experience with Bluedial when you buy your next watch.
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