Violarite
Black coating of rare nickel and iron sulfide from the 5th level of the Svornost mine, from the Prokop vein.
Pyrargyrite
Very rich specimen composed exclusively of pyrargyrite, which forms glossy crystals up to 8 mm large projecting into space with […]
Dyscrasite
Silver, lustrous, flaky crystals of silver antimonide. Dyscrasite on the specimen forms twinned up to dendritically grown crystals. The largest […]
Dyscrasite
Metallic luster, bladed crystals of dyscrasite richly grown on a light carbonate base.
Dyscrasite, arsenic
The complete profile of the vein formed by wire-like crystals of silver Dyskrazit ranging from 2 to 5 mm in […]
Argentopyrite, proustite
A beautiful sample of red, lustrous proustit crystals on a contrasting snow-white calcite, on which dark, slightly iridescent argentopyrit tablets […]
Pyrargyrite
A cavity in calcite measuring 2 × 1 cm, in which there is an intergrowth of pyrargyrite crystals and pyrite […]
Marcasite
Esthetic twin sprouts of glossy crystals of marcasite. The sample originates from the 1970s.
Marcasite
Cluster of hoof-shaped twinned, shiny crystals of marcasite. The specimen is from the 1970s.
Boulangerite
Dark, sometimes bluish needles of boulangerite, approximately half a centimeter long, growing into a cavity approximately 2.5 × 1.5 cm […]
Miargyrit
Dva milimetry velká srostlice krystalů miargyritu narostlá v dutině masivního křemene.
Aluminite
Alum white efflorescence.