ORGANIC MATERIALS
Organic materials are materials made by living things (plants, animals, fungi and other decomposers or microorganisms). Leather and cork, once used as a seal against dust, are examples of organic materials used in the watch industry in the past. Leather is of course still used as a watch strap.
WOOD
In watchmaking, wood is primarily found in the cases of clocks or the boxes of marine chronometers. It is sometimes used as a support during manufacturing and is also valued for polishing various surfaces.
CORK
A thick, light material provided by the bark of certain trees. It was once used as a gasket to make watches dust-proof.
MOTHER-OF-PEARL
It is an organic material primarily made of thin layers of aragonite (a form of calcium carbonate) bound together by an organic matrix. In watchmaking, mother-of-pearl is highly valued for its natural iridescence, unique visual patterns, and luxurious appeal, most often appearing in dials and decorative elements.