Surah Ar-Rahman 55:58

كَأَنَّهُنَّ ٱلْيَاقُوتُ وَٱلْمَرْجَانُ

As if they were rubies and coral.

Translation: Saheeh International

Tafsir

It is as though they are rubies in their purity and pearls in their fairness.

Excerpt from Tafsir al-Jalalayn, commentary on 55:58, via Quran.com. The reader has the full commentary and 9 more tafsirs.