bullion

The money was then allegedly used to purchase gold from reputable bullion suppliers.

It was carrying more than 60 chests of silver bullion that have never been found.

Some large plaques also pay tribute to historic events such as the last stagecoach robbery in Kern County in 1869, in which a gunman made off with $1,700 in coinage and gold bullion.

Some of the bullion was presented as evidence.

Byzantine bullion fuelled Europe's revolutionary adoption of silver coins in the mid-7th century, only to be overtaken by silver from a mine in Charlemagne's Francia a century later, new tests reveal.