An exceptional specimen of transparent quartz-rock crystal, followed by galena – secondary strongly dissolved, overgrowth by very well developed tetrahedral sphalerite – marmatite crystals with extremely lustrous faces with many twinned crystals.
An exceptional specimen of transparent quartz-rock crystal, followed by galena – secondary strongly dissolved, overgrowth by very well developed tetrahedral sphalerite – marmatite crystals with extremely lustrous faces with many twinned crystals.