Calcite
Bidirectional sample of two-generation calcite. The first generation consists of 1 – 1.5 cm large scalenohedrons sprinkled with small pyrite, […]
Calcite
Druse of scalenohedral calcite crystals on which younger calcite with prismatic development is growing from one direction.
Calcite, pyrite
Scalenohedral calcite crystals 2 to 3 cm large overgrown on one side with second-generation calcite with a prismatic habit and […]
Calcite
Scalenohedral calcite crystals up to 2 cm large overgrown by younger, smaller, hypoparallel-grown crystals. The sample is further complemented by […]
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 […]
Pyrargyrite
A cavity in calcite measuring 2 × 1 cm, in which there is an intergrowth of pyrargyrite crystals and pyrite […]
Boulangerite
Dark, sometimes bluish needles of boulangerite, approximately half a centimeter long, growing into a cavity approximately 2.5 × 1.5 cm […]
Stephanite
Two approximately 1.5 mm sized stefanite crystals grown in a cavity with quartz and pyrite.
Goethite, smoky quartz
Dutina v příbramské žílovině porostlá hnědým goethitem s krystaly světlé záhnědy.