Sapphire crystal is a type of watch crystal that is made from synthetic sapphire. It is the second hardest material on the Mohs scale, just behind diamond, making it very scratch-resistant. Sapphire crystal is also very clear, making it ideal for watches with a see-through case back.

There are several benefits to using sapphire crystal in watches:

• It is very scratch-resistant, which means that it will not easily scratch or scuff.
• It is very clear, which allows for a good view of the watch face and movement.
• It is very durable, and can withstand knocks and bumps.
• It is also very resistant to chemicals, which means that it will not be damaged by sweat or other liquids.

The main downside to sapphire crystal is that it is more expensive than other types of watch crystal, such as mineral crystal. However, for watches that are intended for everyday wear, the added cost of sapphire crystal is often worth it for the peace of mind that comes with knowing that your watch is protected from scratches and other damage.

Here are some of the best watches with sapphire crystal:

• Rolex Submariner
• Omega Seamaster
• Breitling Navitimer
• IWC Portugieser
• Cartier Santos

These are just a few of the many great watches that feature sapphire crystal. If you are looking for a watch that is both stylish and durable, then a watch with sapphire crystal is a great option.