'silver-rich' originates from English, specifically a compound of the words 'silver' and 'rich', where 'silver' meant the metal silver and 'rich' meant having wealth or abundance.

'silver' changed from Old English word 'seolfor' and earlier Germanic forms, and 'rich' changed from Old English word 'rīce' (or similar Old English forms meaning powerful or wealthy); these elements were combined in Modern English to form the compound 'silver-rich'.

Initially, the components meant 'the metal silver' and 'having wealth or abundance', and together they have continued to mean 'having a large amount of silver' in modern usage.