Ore deposit type: Hydrothermal, polymetallic vein type
Provenance: Cantieri di Ponente, level +179,00 m, Montevecchio Mine (Sardinia)
Description: The vein is composed of more or less continuous bands of sphalerite (brown, anhedral, with adamantine luster and evident cleavage), siderite (cream, with vitreous luster and evident cleavage), pyrite (yellow, altered), galena (not visible) in quartz gangue (white).