'sulfide-rich' originates from the combination of 'sulfide,' which comes from the Latin word 'sulfur,' meaning 'brimstone,' and the English word 'rich,' meaning 'abundant.'

'sulfide' was derived from the French word 'sulfure,' which evolved into the modern English 'sulfide.'

Initially, 'sulfide' referred to compounds containing sulfur, and 'rich' meant abundant. Together, they describe a material with a high concentration of sulfide compounds.