Specimens of massive grey dolomite with a somewhat rhombic form, most likely a form of ankerite from Aust-Agder, Norway. Specimens are supplied in a white card tray with an information label, an interesting variation of dolomite and a must have for any mineral collection. Please note that some specimens may contain small amounts of actinolite and therefore all care must be taken to avoid breaking or disturbing the actinolite.
Dunite igneous rock specimens from the Gusdal olivine pit in Åheim, southern Norway. Composed of green olivine minerals with chromite and pyroxene crystals, the rock forms as intrusive igneous plutons in the earth mantle down to 400 km deep and displays a coarse texture and green colouration. Overall, the samples are fairly granular and weak due to their chemistry and form part of the basal gneiss complex of southern Norway. Ideal for various levels of collectors and for higher level education and research use, the samples are available in three sizes and come supplied in a card tray with an information label.
Garnet peridotite igneous rock specimens found in the Gusdal Olivine Pit, Åheim, Norway is an ultra mafic rock which contains high pressure and temperature minerals such as olivine and garnet crystals. Exhibiting a green colouraiton with striking red spots, these samples were pushed up to the earths crust during the Caledonian orogeny during the Ordovician and Devonian period over 400 million years ago. The specimens are dense as expected and are ideal for children and serious collectors because of the colourful appearance as well as for higher educational use to describe deep mantle material as well as orogenic processes. The hand samples are available in various sizes and come supplied in a card tray with an information label.
Specimens of nepheline syenite sourced from the Larvik municipality, Norway. These samples have a reddish brown to pale grey colouration and display crystals of aegirine. Specimens are available in multiple sizes and come supplied in a card tray with an information label.
An igneous rock exhibiting a porphyritic texture containing large cubic crystals of feldspar within a fine grained matrix. Collected near Oslo, Norway. Each sample is supplied in a labelled card tray. Each sample is supplied in a labelled card tray.