Copper in gypsum
Beautiful dendritic, thin crystals of pure copper in a clear gypsum crystal.
Pyrite
Radiálí agregát pyritu tvořící tzv. “pyritové slunce”.
Benitoite
Gorgeous, dark blue crystals of a rare silicate of barium and titanium up to 18 mm in size.
Linarite
An aesthetic cluster of intensely blue Linarite crystals from the renowned Arizona locality that grew on quartz. The size of […]
Agate
Striped agate with a central cavity filled with small quartz crystals .
Agate
Colorfully banded agate from the northwest United States.
Siegenite
Cluster of metallic luster octahedral crystals of cobalt and nickel sulfide – Siegenite with white rhombohedrons of dolomite, also present […]
Gold ore
Gold droplets up to one millimeter in size formed during the roasting of gold ore. Historical sample from a renowned […]
Haynesite
“Flowers” of intensely yellow hayesite (uranium and selenium oxide) from the type locality. Only three occurrences of this mineral have […]
Linarite
Intensely blue crystals of Linarite up to 6 mm. Unfortunately, the crystals are impressed.
Metaschoderite
Eye of a yellow powdery extremely rare phosphate and vanadate of aluminium from the type locality in Nevada. The mineral […]
Hessite, winstanleyite, rodalquilarite
Specimen of rare minerals, silver-gray Hessite, green Rodalquilarite, and brown Winstanleyite from the mines in the Tombstone area of Arizona. […]