Surah Ar-Rahman 55:22

يَخْرُجُ مِنْهُمَا ٱللُّؤْلُؤُ وَٱلْمَرْجَانُ

From both of them emerge pearl and coral.

Translation: Saheeh International

Tafsir

From both of them from the point at which they seem to meet — but which is actually from only one of the two and that is the salt water — is brought forth yukhraju passive may also be read as active yakhruju ‘emerge’ the pearl and the coral marjān these are red pieces of shell or small pearls.

Excerpt from Tafsir al-Jalalayn, commentary on 55:22, via Quran.com. The reader has the full commentary and 9 more tafsirs.