QUARTZ, SIDERITE

A huge size double terminated quartz specimen. Elongated prism faces showing some parallel growths and well defined terminal rhombohedral faces. As it is very usual in Panasqueira’s big size quartz crystals it shows a delicate opalescent transparence but an excellent brilliance. Partially covered by several small siderite crystals on three of the prism and terminal faces. Very interesting specimen. THE MAIN CRYSTAL IS: 16,4 x 3,7 x 2,9 cm.