Pyrolusite with limonite inclusions
High Purity Peruvian Pyrite
Mica
Gabon red soil samples
Types of Garnet Minerals
diorite
synenite
The orthostone of the alkaline massif
Syenite in alkaline rock mass
Ore-bearing fibrous calcite
banded aralite containing silicon carbide
spinel crystal
silverite
Polished Amethyst
Peruvian cubic pyrite
Basalt of the Canary Islands, Spain
fault breccia
The volcanic bomb on Tenerife Island
Uranium bearing igneous rock
Sphalerite
Techereu Jade
Syenite in alkaline rock masses
Megalite rock
Opal stone