Galena
Galena is an opaque strong ore with a metallic luster, an important source of lead. Date: 1980. Place of origin: […]
Fossils
Bornite–Magnetite–Chalcopyrite Ore
Bornite-magnetite-chalcopyrite ore. A complex mineral association containing the primary ore minerals of copper and iron: bornite with a bluish tint,
Bone Fragment
Bone fragment (Paraceratherium). The distal part of a tubular bone of the giant rhinoceros (Paraceratherium). The paleontological specimen dates back
Conglomerate
Conglomerate. A sedimentary rock consisting of rounded fragments of gravel, small stone pieces, and aleurolitic material, cemented by a natural
Quartz Ore Specimen
Quartz ore. A sample of hydrothermal origin with quartz as the main mineral-forming component. The quartz mass contains the minerals
Coarse-crystalline
Coarse-grained marble with a bluish tint. A metamorphic rock whose main mineral component is calcite (CaCO₃). The sample exhibits chambered
Bornite
Bornite-magnetite-chalcopyrite ore. A complex mineral association containing important ore minerals of copper and iron. Bornite is characterized by blue-to-purple hues,
Alevramite
Aleurolite. A fine-grained sedimentary rock. The sample has a reddish-brown color and predominantly consists of aleurite particles, clay material, and
Bornite
Bornite-magnetite-chalcopyrite ore. The sample contains ore minerals of copper and iron. Bornite is characterized by blue iridescent shades, magnetite has
Chalcopyrite
Chalcopyrite. One of the main ore minerals of copper, belonging to the sulfide group. It is characterized by a golden-yellow