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 .
Prismatine
Columnar crystals of grey, very rare borosilicate prismatine (described only in 9 locations) in a white to beige talc.