However, you could use a couple of options depending on the context:
* "Pohaku makamae" literally translates to "precious stone," and could be used to refer to a diamond.
* "Kilauea" refers to a volcanic crater, and since diamonds are formed under extreme heat and pressure, you could use it metaphorically to describe a diamond's origin.
Ultimately, the best way to convey the meaning of "diamond" in Hawaiian would be to describe its characteristics, such as its brilliance, hardness, or rarity.