Planishing

Planishing - a hammering process which is done so that the piece of metal has a smoother finish.
Poison ring - a ring made with a small hinged box in the setting which opens to a small chamber which could hold a poison pill.

Planishing
A hammering process done to give a smoother finish to a piece of metal
Platinum ...

Piqué
Tortoiseshell or horn which is inlaid with mother-of-pearl, silver or gold

Planishing
A hammering process done to give a smoother finish to a piece of metal ...

This can be done by careful planishing or with the help of a rolling mill. Rolling can be done before or after cutting out the blank, but it will slightly distort the form, so some filing will be needed in either case.

as a hardstone mosaic Pinchbeck A gold simulant, invented circa 1720 by Christopher Pinchbeck, which is comprised of a mixture of copper and zinc Piqué Tortoiseshell or horn which is inlaid with mother-of-pearl, silver or gold Planishing ...

See also: Make, Cut, Double, Metal, Point