Scratch resistant glass with a hardness of 9 on the moh's scale of hardness. The only thing harder is diamond. Sapphire crystals are usually synthetic (made in a lab).
A very hard, transparent material. Due to its hardness, this makes it more brittle and easier to shatter compared to Mineral glass or Plexiglas. Both natural and synthetic sapphire is one of the hardest substances found. It measures 9 on a scale of 10. Diamond is a 10. Only a diamond can scratch a sapphire crystal.
The most durable watch crystal or dial face, made from synthetic sapphires and only another sapphire or diamond can scratch its surface.
Extremely hard material used for watch crystals.
A crystal made of synthetic sapphire.
A transparent crystal frequently used in watch making due to its resistance to scratching.
Scratch resistant glass with a hardness of 9. Mineral glass has a hardness of 5.
Scratch-resistant man-made material (synthetic corundum) used for watch crystals, fitted over the dial and sometimes set into the case back.
a solid, transparent, shock-resistant, anti-scratch synthetic sapphire glass covering the face of the watch and , in some instances, the back of the watch. This kind of crystal is being used in high-end watches.
The “crystal” is the covering on the face of the watch. Sapphire crystals are scratch resistant and are less prone to breakage then standard mineral crystals. In general, luxury watches contain the more expensive, sapphire crystal.
Synthetic sapphire formed for use as the crystal of a watch. Extremely scratch resistant (9 on the Moh scale), a sapphire crystal is the material of choice for many watch collectors. The downsides are that sapphire can chip at the edges if they protrude and can shatter.
Highest quality transparent that is scratch resistant under normal conditions.
