Contents
Definition
The “crystal” in watches refers to the transparent covering that protects the watch dial. This covering can be made of various materials, such as glass, mineral crystal, sapphire crystal, or acrylic plastic, each offering different levels of resistance to scratches and impacts.
Origin
The term “crystal” comes from the Greek “krystallos,” which originally meant frozen ice to the point of becoming stone. Over time, the term came to describe transparent and shiny materials. The use of crystals in watches began in the 20th century, when advances in glass and plastic manufacturing allowed for the creation of more durable and transparent coverings for dials.
Use
In the watch industry, the crystal is a crucial component, protecting the dial and hands. The type of crystal used is often a highlight in watch descriptions, especially in luxury models, where sapphire crystal is valued for its extreme scratch resistance.
Examples
Watches with sapphire crystal, such as many Rolex and Omega models, are known for their durability.
More affordable watches may use mineral crystal, which offers a good balance between resistance and cost.
Vintage watches often have acrylic crystals, which are less scratch-resistant but easier to polish.
Synonyms
- “Watch glass” is a common term, although it may be less specific.
- “Acrylic” is specifically used to refer to watch crystals made of this material.
Related Terms
- “Dial“: the part of the watch that the crystal protects.
- “Bezel“: the frame that often surrounds the crystal and dial.
- “Scratch resistance”: an attribute commonly associated with different types of crystals.
Tips
To identify the type of crystal, observe the refraction of light and the feel of touch; sapphire crystal, for example, tends to have a cooler touch and less refraction than mineral glass.
For care, use a soft cloth and non-abrasive cleaning products.
Fun Facts
Sapphire crystal is almost as hard as diamond, being the second hardest material.
The transition from acrylic crystals to mineral and sapphire reflects technological advancements and the pursuit of greater durability in watches.