Learn about Siderite
warm-toned iron carbonate with sharp rhombohedra and occasional gemmy crystals; prized for luster, classic localities Harz, Panasqueira, Dal’negorsk.Siderite from Panasqueira Mines, Portugal
from Panasqueira, Portugal — lustrous tan to cream rhombohedra in rosettes and masses; a world-class, modern classic from a magmatic-hydrothermal vein.Panasqueira Mines
Panasqueira Mines, Portugal — premier locality yielding tungsten, ferberite, arsenopyrite, fluorapatite, and colorful quartz associations prized by collectors.
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