Whewellite, siderite
A rich specimen of yellowish whewellite crystals up to 2 mm on siderite from the coal mines of Bílina.
Amber
Large piece of dark natural amber.
Amber
A large piece of natural fossilized resin from the Baltic Sea.
Amber
A large, beautiful specimen of natural amber from the Kaliningrad area.
Mellite
A very rich druse composed mostly of yellow-orange melilite. The largest melilite crystal on the sample has an unusual width […]
Fool's Gold
Growth of small crystals of white organolite from the type locality.
Fool's Gold
Yellowish crusts of the rare organic mineral Kratochvílit from the locality Freital.
Whewellite
The paragenesis of whewellite and ankerite on the siderite-bearing shale.
Amber with insects
Historical collection of 23 different types of amber from yellow-orange to red-brown color in a paper glazed cassette. There are […]
Duxite
The dark brown variety of amber called duxit grown on brown coal.
Whewellite
Two crystals of clear monohydrate oxalate vanadate. The crystals are 1 cm in size.
Whewellite
Cluster of several crystals of white, at the edges clear whewellit.