Galena and sphalerite crystallized Zlotograd Bulgaria.
Lead ore and zinc ore.
Galena has been known since antiquity.
It is used for the extraction of lead for the glass industry and ceramics.
The galena crystals are cubic, chemical formula PbS.
Dimensions 5.5x4.5x3.5 cm.
Weight 156 gr.
Galena, sphalerite and siderite from Turt in Romania.
The matrix consists of massive galena covered with brown sphalerite crystals.
2 siderite crystals and a twin in the center.
Galena is a lead ore, sphalerite is a zinc ore and siderite iron carbonate.
Dimensions 7x5.5x3.5 cm.
Weight 390 gr.