they are the very model of a modern major mineral (cue Tom Lehrer) - showdown starts 01/09 #MinCup2023 #promotextual @MineralCup
Moissanite v Kaolinite
Fluorapatite v Zircon
Dioptase v Crocoite
Vivianite v Cavansite
Mercury v Sepiolite
Calcite v Opal
Cacoxenite v Bischofite
Sapphirine v Kyanite
Cinnabar v Quartz
Stibnite v Sodalite
Topaz v Goethite
Corundum v Lawsonite
Ammineite v Adamite
Galena v Perovskite
Arsenuranospathite v Neptunite
Rhodochrosite v Lizardite