A setting is the part of a ring that holds a stone. There are different kinds: Bar, Channel, Pave, Prong, and Tiffany settings (a prong setting with six prongs), among others. A jeweler can show you more.
Generally it takes place in Middle Earth. Some towns or sites that are shown in the Fellowship of the Ring include Hobbiton, Bree, Rivendell, the Mines of Moria, and Lothlorien.
I'm not entirely sure I understand the question. Are you asking what a prong setting is or how you can acquire a prong set diamond engagement ring? In regards to the first option: a prong setting...
Tiffany SettingThe term means a jewel mounted by using small prongs around the outside of the jewel, typically six equally spaced prongs. This setting shows off most of the stone, and is popular on...