Ludwigite
A larger massive sample composed mostly of fibrous radiating black ludwigite. Ludwigite is a relatively uncommon borate of iron and […]
Sylvanite
Several silvery shiny laths of the rare Sylvanite up to 5 mm in size from the type locality Baia de […]
Hydrocerussite, lead
Millerite
Nickel sulfide needles from the 5th floor of the Prokop vein.
Diaforite
An extremely large (13 millimeters long), crystal of the rare silver sulfosalt – diaphorite. The crystal is incomplete on the […]
Sternbergit
Metallic, bronze-looking Sternbergite crystals on a massive Proustit. The largest crystal is about 0.5 mm big. Jáchymov is the type […]
Xanthoconite, sternbergite, proustite
A mineralogically very interesting combination of intense red proustit crystals with rare orange Xanthoconite and black shiny plates of Sternbergite. […]
Zeophyllite
Three centimeters large cavity filled with fan-like aggregates of pearly lustrous Zeofylit. Velké Březno is the type locality for Zeofylit.
Kettnerite
Plates of the rare mineral kettnerite covered with brown hematite. Krupka is the type locality for this mineral.
Kettnerite
Plates of the rare mineral kettnerite covered with brown hematite. Krupka is the type locality for this mineral.
Phenakite
A crystal of colorless translucent beryllium silicate – phenakite from one side terminated by a prism. Malyševo is a type […]
Kulanite
Glossy Kulanite crystals with zonal green-blue coloring with Rock Crystal and beige Siderite crystals. The largest Kulanite crystal is 7 […]