The tablets were mainly made of the zinc carbonates hydrozincite and smithsonite, echoing the widespread use of zinc-based minerals in today's eye and skin medications. |
The oldest known pills were made of the zinc carbonates hydrozincite and smithsonite. |
In addition, a strongly hydrozincite stained mudstone occurs approximately 150 meters stratigraphically lower than the present exhalite-mudstone-dacite sequence being drilled. |