Siderite, Calcite, Pyrite on Ferberite (Art Soregaroli Coll.)

Item Description

Sculptural and impressive large siderite from the famous Panasqueira mines. The densely intergrown stout, sharp rhombohedrons are dominated by the striking large 6.8 cm rhomb and highlighted by the fascinating preferential coatings on one side of the crystals. The highly lustrous gray-brown faces are peppered with tiny sparkly pyrite microcrystals. The crystal backsides have an interesting preferential coating of drusy calcite and pyrite microcrystals. A REAL bonus is the underlying matrix of sections of large parallel-growth, splendent jet-black ferberite blades. See the fine 2014 Mineralogical Record article in Vol. 45, No. 1. Ex Art Soregaroli Collection. The siderites are all pristine. An outstanding large siderite combination from the classic locale.