Mines of Marlion

The Diamond Mines of Marlion were noted in Reginald Tyler's The True History of Planets. (PROSE: Mad Dogs and Englishmen)

Iris Wildthyme and Jenny Winterleaf once helped the Second Doctor defeat the Dalek Supreme in the Diamond Mines of Marlion. (PROSE: Bafflement and Devotion) In either the same adventure or a separate occasion, Iris stole a damaged Memory Crystal from the mines gift shop after knocking down the shop display. (AUDIO: Wildthyme at Large)

They had a unique currency of diamonds. (PROSE: The Panda Book of Horror)