'Emerald' in the Bible

The appearance of Him who sat there was like jasper or sard; and encircling the throne was a rainbow, in appearance like an emerald.

As for the foundation-stones of the city wall, which were beautified with various kinds of precious stones, the first was jasper, the second sapphire, the third chalcedony, the fourth emerald, the fifth sardonyx, the sixth sardius,