Portal:Minerals/Did you know/15


 * ... that leonite (pictured) has been found on Mars?
 * ...that crystals of Paulingite, a rare zeolite mineral found in vesicles in the basaltic rocks from the Columbia River, form a perfect clear rhombic dodecahedron?
 * ... that abernathyite is both fluorescent and radioactive and is named for the mine operator who discovered it?