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 […]
Vanadinite
Druse of shiny vanadinite crystals up to 1 cm large .
Turmalín - paraíba
Nádherný segment krystalu turmalínu intenzivně modré barvy ve velmi vysoké brousitelné kvalitě. Tento typ vzácného turmalínu, u kterého je modrá […]
Cassiterite
Glossy black cassiterite crystals on a quartz matrix with tiny crystals of intense purple fluorite. Both of the largest cassiterite […]
Precious opal
Very nicely colored precious opal measuring 12 × 10 mm.
Calcite
Druse of scalenohedral calcite crystals on which younger calcite with prismatic development is growing from one direction.
Goshenite
Two crystals of clear, in some places even transparent, gem-quality beryl. The larger crystal, measuring 4 cm, is naturally damaged […]
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 […]
Dioptase
Intensely green crystals of glossy dioptase up to 2 mm in size with fibrous malachite needles.
Gadolinite
Specimen of black massive silicate of beryl and rare earths – gadolinite .