Wikipedia
Rivia
The Rivia (Hebrew: , also sometimes called Rivi'i, with other variant English spellings) is a cantillation mark commonly found in the Torah, Haftarah, and other biblical texts.
Rivia is considered to have medium strength. It is stronger than a Pashta or Tevir, but weaker than a Zakef or Tipcha.
The Rivia can occur either by itself, or following one or two Munachs. When there are two Munachs prior to a Rivia, the first Munach has a long melody, and the second one is short. When there is one Munach, it is short.
The Hebrew word רְבִ֗יע means fourth. It is therefore represented by a diamond-shaped mark.