Sapphire crystal, known for its high hardness and excellent scratch resistance, has become the top choice for high-end watch manufacturers. However, not all sapphire glasses are the same. Here’s an overview by Min Luxury of the common types of sapphire glass and the pros and cons of each type.
Common Types of Sapphire Crystal in Watches
- Thin Coated Sapphire Crystal
This type of glass has a thin layer of sapphire coating on the surface. Its characteristic is fragile and prone to breakage upon impact, as it retains the nature of regular glass. Watches using this type of glass are often imitation versions with lower prices.
- Thick Coated Sapphire Crystal
Similar to the above type, but the sapphire layer on the surface is thicker, increasing the durability and lifespan of the glass. 3. Solid Sapphire Crystal
This is the best type of sapphire glass, with hardness second only to diamond. Watches using this type are typically high-end products from famous brands.
- Curved Sapphire Crystal
There are two types of curved sapphire glass: single and double curved. The single curved type is usually thicker at the center and gradually thinner towards the edges, creating a magnification effect. Meanwhile, the double curved type curves on both sides, creating a multidimensional depth.
- Sapphire Crystal with Cyclops
The Cyclops glass is often placed on the date display window of the watch, with a magnification ratio of up to 2.5 times. This type of glass requires high technical and aesthetic standards.
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Advantages and Disadvantages of Sapphire Crystal
Advantages of Sapphire Crystal:
High resistance to corrosion and heat. Effective scratch resistance, easy to clean. High transparency, maintaining the natural color of the watch.
Disadvantages of Sapphire Crystal:
High cost. Requires replacement when broken, cannot be polished again. Careful with broken pieces to avoid scratching the skin.
Comparison of Sapphire with Other Types of Glass
Sapphire vs. Hardened Glass:
Sapphire: Expensive, excellent scratch resistance, suitable for high-end watches.
Hardened Glass: Moderate price, easy to polish, common in fashion watches.
Sapphire vs. Plastic Glass:
Sapphire: Expensive, high scratch resistance, common in high-end watches.
Plastic Glass: Affordable, prone to fogging, found in low-cost watches.
Sapphire crystal is not only a protective material for watches but also a symbol of class and luxury. Hopefully, this article helps you understand more about the various types of sapphire glass and choose the most suitable one for your watch.
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