'Pearl' in the Bible

and having found one pearl of great value, he went and sold all whatever he had and bought it.

lading of gold, and silver, and precious stones, and pearl, and fine linen, and purple, and silk, and scarlet dye, and all thyine wood, and every article in ivory, and every article in most precious wood, and in brass, and in iron, and in marble,

And the twelve gates, twelve pearls; each one of the gates, respectively, was of one pearl; and the street of the city pure gold, as transparent glass.