Rhodochrosite - Peru
Limonite after Marcasite Desert Concretion - Morocco
Chalcedony geode - New Mexico
Nepheline coated by Sodalite and colored by electric-blue Nosean flecks in the clear Sodalite - Afghanistan
Polished slice of an Octahedrite iron meteorite, that has been etched with acids to show the Widmanstatten structure