Description
Schalenblende is a compact, fine grained mixture of sulfides, dominated by Sphalerite of a dark and mid brown to yellow or cream colour, occurring in concentric layers with reniform surfaces which also may contain intergrown, marcasite, pyrite, galena and possible wurtzite. It is believed to have formed by relatively rapid crystallization of a low temperature sulfide gel (mindat). And here we have a beautiful miniature sized specimen from the classic Altenberg Mine near Aachen,- nowadays the area of the locality belongs to Belgium. Rare material and very hard to come by these days.