Mineral Specimen #4597 Calcite on Ferberite and Siderite with minor Pyrite
Panasquiera Mines, Panasquiera, Portugal
Bladed, off white colored Calcite crystals have completed covered a crystal of Siderite and a crystal of Ferberite. The Siderite is an attractive, dark green color, has a high luster, is semi gemmy and consists of cleavage planes. The Ferberite is black with a submetallic luster. Most of the surfaces are crystal faces with some termination showing - although most are underneth the Calcite. There are a few, samll, cubic Pyrite crystals on the termianted surfaces.
Condition: Very Good
Flaws: Nothing Appreciable