* Hawaiian doesn't have a specific word for "pearl." The closest term would be "pōhaku maka", meaning "eye stone," which is a general term for any gemstone.
* "Black" in Hawaiian is "ʻeleʻele." This can be combined with "pōhaku maka" to make "ʻeleʻele pōhaku maka" (literally "black eye stone").
However, "ʻeleʻele pōhaku maka" is not a common phrase in Hawaiian. You might consider using a more descriptive phrase like:
* "Pōhaku maka ʻeleʻele nani": "Beautiful black eye stone"
* "Pōhaku maka ʻeleʻele mai ka moana": "Black eye stone from the ocean"
Ultimately, the best way to describe a black pearl in Hawaiian depends on the context and what you want to emphasize.