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.
Found as clusters of crystals to 2cm lining cavities in stone nodules in the clay. Bright translucent blue-green when first found, they soon oxidise and darken. Almost certainly the best UK mainland source of Vivianite in recent years.
Southleigh Landfill Site, Havant, Hampshire, England, UK