mineralist
/ˈmɪn(ə)rəlɪst/ /ˈmɪn(ə)r(ə)lɪst/noun
1= iatrochemist. Compare mineral. Now historical.
2More generally: a person expert in or familiar with the uses and properties of (especially economically important) minerals and ores; a mineralogist.
Origin
Early 17th century; earliest use found in John Ford (bap. 1586, d. a1653), playwright. From mineral + -ist.