Sylvanite
Several silvery shiny laths of the rare Sylvanite up to 5 mm in size from the type locality Baia de […]
Calaverite (roasted ore)
An interesting sample of gold ore originally composed of gold telluride – calaverite, which was subsequently subjected to a heat […]
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
Silver shiny, bladed crystals of dyskrazite occasionally forming fan-shaped aggregates with matte black arsenic on a white carbonate substrate. The […]
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.