Pictured is a gem-set gold ring from the Southern Song dynasty (1127 – 1279), unearthed from the “Nanhai I” shipwreck in 2014. (Collection of the Guangdong Provincial Institute of Cultural Relics and Archaeology)

Pictured is a gem-set gold ring from the Southern Song dynasty (1127 – 1279), unearthed from the “Nanhai I” shipwreck in 2014. (Collection of the Guangdong Provincial Institute of Cultural Relics and Archaeology)

Pictured is a gem-set gold ring from the Southern Song dynasty (1127 – 1279), unearthed from the “Nanhai I” shipwreck in 2014. (Collection of the Guangdong Provincial Institute of Cultural Relics and Archaeology)