Ryzí měď v sádrovci
Nádherné dendritické, tenké krystaly ryzí mědi v čirém krystalu sádrovce.
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.
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.
Metaschoderit
Eye of a yellow powdery extremely rare phosphate and vanadate of aluminium from the type locality in Nevada. The mineral […]
Hessit, winstanleyit, rodalquilarit
Sample of rare minerals, silver-gray Hessite, green Rodalquilarite, and brown Winstanleyite from the mines in the Tombstone area of Arizona. […]
Fencooperite, gillespite, sanbornite
Black grains of fencooperite in association with red grains of gillespite in white sanbornite. Clear, vitreous grains are formed by […]
Fencooperite, gillespite, sanbornite
Black grains of fencooperite in association with red grains of gillespite in white sanbornite. The clear, vitreous grains form Celsian. […]