«وَعَنْ طَلْعٍ وَعَنْ حَبَبٍ»
And also palm blossom and the rounded bubbles of water.
Ṭalʿ may denote the emerging blossom of the date palm; ḥabab refers here to rounded bubbles or beads formed on water. They supplement the pearls, hailstones, and flowers.
The five comparison-images explore colour, shine, freshness, shape, and arrangement rather than repeating one identical visual property.