A prong setting is small claws of metal gripping a stone. A four prong setting.
It holds the stone up so light can get underneath it, which is what makes a diamond bright. A prong setting catches on clothing and needs checking every year or two.
1nounprong settingSmall claws of metal gripping a stone.
“One claw of the prong setting had worn almost through.”
prong setting is a setting.
Practised in Jewellery & Watches