|There is more information available on this subject at Gold on the English Wikipedia.|
Due to its preciousness to Humans, in 2552, a group of ODSTs plotted to steal a large amount of gold bullion from a bank while on a mission in a Covenant-occupied city. However, their plan was scuttled when they discovered a class of schoolchildren and their teacher hiding in the vault. An argument erupted amongst the ODSTs over whether or not the children could allowed to live. The ODSTs turned on one another and several were killed in a point-blank shootout. The children fled while an ODST took the gold, several Forerunner relics, and a nuclear device. They then lured in the Covenant and the traitorous ODSTs, and detonated the nuke, destroying it all. The entire operation would be halted after receiving word of the Covenant attack on Earth. The UNSC ships were then forced to pull out.