'polymineralic' originates from Greek and Medieval Latin, specifically the prefix 'poly-' from Greek 'polys' where 'polys' meant 'many', and the element 'mineral' from Medieval Latin 'minerale' where 'minerale' meant 'a substance obtained from a mine.'

'polymineralic' developed as a compound/adjective by joining 'poly-' + 'mineral' and adding the adjective suffix '-ic' (formation common in scientific English); the sequence moved from the separate elements ('poly' + 'mineral') into the single adjective form 'polymineralic' in modern technical usage.

Initially formed to mean 'having many minerals' (a literal compound of 'many' + 'mineral'), and this original sense has been retained in current technical usage.