Romans 16:23 salute you doth Gaius, my host, and of the whole assembly; salute you doth Erastus, the steward of the city, and Quartus the brother, (See NIV)
Revelation 21:19 The foundations of the city's wall were adorned with all kinds of precious stones. The first foundation was jasper; the second, sapphire; the third, chalcedony; the fourth, emerald; (WEB)