Description
What an exceptional specimen, a great pseudomorph. Goethite after Marcasite: A superb floater, dark brown in color with a faint metallic luster and only very minimal imperfections from the White Desert National Park, about 45 km north of the Farafra Oasis smack dab in the middle of the Lybian Desert. Recent research has confirmed that these pseudomorphs consist of iron hydroxides, primarily Goethite