An old-time, uncommon and showy siderite varietal, sphaerosiderite, from the Baia Sprie Mine (Felsobanya) of Romania. The thin sulfide crust is covered with waxy, low luster, dark honey-brown, microcrystalline, botryoidal siderite. Comes with a Dr. F. Fuchs, Bonn label, which from the style, appears to be around 1900-1910. The collection this came out of was a museum stash dating to prior to World War I.