U+0597 Hebrew Accent Revia

The Wikipedia has the following information about this codepoint:

Revia (רְבִיעַ‎, [r^əviaʕ]) is a cantillation mark commonly found in the Torah, Haftarah, and other biblical texts.

It is commonly explained as being the Aramaic equivalent of Hebrew רְבִיעִי‎ Revi'i, meaning 'fourth' or 'quarter'., and for that reason is sometimes called Revi'i. However, this is probably a folk etymology: the more likely meaning in Aramaic is "crouching" or "lying", referring to its position vertically above the word.

Revia is considered to have medium strength. It is stronger than a Pashta or Tevir, but weaker than a Zakef or Tifcha.

Revia can occur either by itself, or following one or two Munachs. When there are two Munachs prior to a Revia, the first Munach has a long melody, and the second one is short. When there is one Munach, it is short.

Based on its translation as fourth, in printed texts it is represented by a diamond-shaped mark. However in manuscripts it is just a dot.