A style of setting for securing a gemstone in a finger ring by making small shavings in the shank at intervals around the stone and bending them so that each forms a bead against the stone to hold itin place.Sometimes two such beads are made adjacent to each other and a third behind them to form a triangular ornament. Such a setting is used for expensive jewelry. It is sometimes called 'thread and grainsetting'.
Grain Setting

Grain Setting
A style of setting for securing a gemstone in a finger ring by making small shavings in the shank at intervals around the stone and bending them so that each forms a bead against the stone to hold itin place.Sometimes two such beads are made adjacent to each other and a third behind them to form a triangular ornament. Such a setting is used for expensive jewelry. It is sometimes called 'thread and grainsetting'.
References
From: An Illustrated Dictionary of Jewelry, autor: Harold Newman, publishers: Thames and Hudson



