'Pearl' in the Bible

White and violet linen hangings were fastened with fine white and purple linen cords to silver rods on marble columns. Gold and silver couches were arranged on a mosaic pavement of red feldspar, marble, mother-of-pearl, and precious stones.

When he found one priceless pearl, he went and sold everything he had, and bought it.

The 12 gates are 12 pearls; each individual gate was made of a single pearl. The broad street of the city was pure gold, like transparent glass.