Deployant Clasp

The deployant clasp is a three-hinged folding clasp that appears hidden when closed. When the deployant clasp is opened, it allows the wearer to place the watch on the wrist without any difficulty. Often mistakenly refered to as a deployment clasp, it is easy to see why such confusion exists. The deployant clasp is the invention of Cartier; its name is derived from the French word deployer, itself derived from the Old French despleier, and it deriving from the Latin displicare, which means to scatter or more appropriately, to fold, i.e. a folding clasp.

Depth

Depth refers to the height of the diamond and is often expressed as depth percentage indicating the depth relative to the girdle diameter.

Dial

The face of a watch.

Dispersion

Flashes of color, or fire, particularly when viewing a diamond in strong, direct light.