#MinCup24 Quartz vs Mercury

Quartz may seem common to us living on the thin continental crust of our planet, but globally and cosmically it's rare: we have a lot due to the lucky chance of our wet planet with subduction plate tectonics. It can also be a fabulous gemstone : here's a lovely Scottish smoky quartz in the collections of the Hunterian museum in Glasgow... Vote quartz! #Geology #Mineralogy #Quartz @MineralCup