Vote for your favorite mineral in #MinCup26! - Quartz vs. Asagiite It's a classic vs a newbie as the most common named mineral in the crust Quartz is up against an exceedingly-rare sea foam-green mineral discovered just a few years ago Asagiite.
Ko Jansen collection. Specimens not analyzed. Most probably resulting from a process of acid leaching and dissolution of sulphide ore minerals in some installations in the vicinity of the mine.