Glossary of watchmaking

Onyx

Onyx

A black agate that is often found as watch dials.

Terms with the same letter

Observatory chronometer Official rating certificate Oignon (watch) Oil sink Oiling Onyx Opale Opaque Organic Orient Ornamental gems Oscillating pinion Oscillating weight (Rotor) Oscillation Oscillator Oval

M M

The mark which a manufacturer stamps on its products.

Any microcrystalline gemstone. Some examples are: Agate, Onyx, Sodalite, Malachite, etc. These ornamental stones are mostly used for watch...