Copper in gypsum
Beautiful dendritic, thin crystals of pure copper in a clear gypsum crystal.
Copper
Native Copper flake.
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.
Lazulite
A double-sided specimen featuring rich blue, glossy lazulite crystals. On one side, lazulite crystals dominate, up to 10 mm in […]
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.
Kulanite
Glossy Kulanite crystals with zonal green-blue coloring with Rock Crystal and beige Siderite crystals. The largest Kulanite crystal is 7 […]
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 […]