Presented specimen is unique because of the locus of occurrence holomorphic zinc and lead ores. It takes the form of fine-grained, dense masses, which, after surface polishing, are very effective - as in the case of our sphalerite.

Calcite is a mineral of the carbonate class, also known as calcium carbonate. Its name derives from the Greek word chalix and the Latin word calx (calcis) – meaning “calcium”, which is a reference to the traditional application of this mineral. It develops isometric, plate, prism and needle crystals.

Malachite is a mineral of the carbonate class, one of the most common minerals and it is widely spread throughout the Earth’s crust. From antiquity, it has been valued as an ornamental stone, amulet and as a medicine. Malachite has been used to produce jewellery, household goods, facing plates used for interior finishing, as well as green dyes and paints.

Quartz is a mineral belonging to the silicate group, mainly made of silicon dioxide. It is one of the most abundant rock-forming minerals present in the Earth’s crust. It is a brittle and transparent mineral. It can develop numerous colour variants, depending on its composition. It can be colourless, as well. Such quartz is called rock crystal.

Marcasite is a common mineral, which is finding mainly in sedimentary rocks, like limestones, marls or clayey rocks. It belongs to the class of sulphides. Marcasite at increased temperatures undergoes irreversibly in pyrite, because it is a impermanent form of pyrite. Marcasite and pyrite are polymorphic variants of iron sulfide. It has a brass-yellow color with a greenish tinge and a metallic sheen.

Native bismuth is a mineral of the native element group, which very rarely occurs in nature, developing small rhombohedral or cuboid forms that resemble crystals. It usually develops grainy aggregates – compact, lamellate or dendritic.

A beautifully educated crystal seems to be something almost magical. Its transparent regular form immediately raises suspicion about the intentionality of the “creator”. However, the mystery has been revealed long time ago. Each mineral, including halite, is a crystal.

Sphalerite is a zinc blende; and galena, is a lead sulfide (lat. galena means lead ore), both are common minerals from the class of sulphide.

Septarian, marlite or clayish and ferruginous concretion is a type of spherical, elliptical or lens-shaped aggregate of minerals occurring within sedimentary rocks, e.g. loam.

A wooden watering can, covered with salt crystals, is undoubtedly an original, but also a typical, object. Many of the objects left by the miners in the mine, especially those that were sunk in brine (salt water), changed their appearance and...