diorite
synenite
The orthostone of the alkaline massif
Syenite in alkaline rock mass
Ore-bearing fibrous calcite
spinel crystal
silverite
UV-irradiated ruby
Quartz crystals of hydrothermal deposits
Polished Amethyst
Gurasada agate
Peruvian cubic pyrite
calcite
Basalt of the Canary Islands, Spain
fault breccia
clinopyroxene
The volcanic bomb on Tenerife Island
Uranium bearing igneous rock
Sphalerite
C ă limani sulfur
Celestite containing shiny pyrite
Blue crystal mineral under ultraviolet irradiation
Blue crystal
Techereu Jade