Domed mineral crystal with base 2.5 mm

At 2.5 mm thick, we enter the category of heavy crystals. This reference is intended for watches whose bezel has a deep groove able to take a thick edge.

Target watches

This crystal is often found on men's watches with an imposing case, sports models or tool watches. Its range starts at 23.5 mm and goes up to 50.0 mm, with 54 diameters available. It generally suits cases where the old crystal combines a thick flat base and a central dome.

What a 2.5 mm thickness changes

• Strength: more material on the base, so a more rigid crystal.
• Height: the crystal takes up more height; check there is still room above the hands.
• Shape: the domed section sits on the flat base that rests in the bezel, and stands proud of it.

The material

Mineral crystal has a standard hardness of about 5 to 6 on the Mohs scale. It is a good compromise between strength and price for a watch worn every day. It remains less scratch resistant than sapphire crystal.

Measuring with a calliper

The diameter is taken at the base of the crystal, on the flat base, never at the dome. The thickness is read on the edge: for this reference, you should find a value close to 2.5 mm. If your old crystal is broken, measure the bezel opening and the depth of the groove. The full method is in our measuring guide.

The table of diameters, shown just below, lets you choose the exact size.

Available diameters