mineral background. folded quartzite stone macro detail. geology

almandine background basalt clinopyroxene close cobble coesite collection crust crystal dense facies folded garnet gem gemstone geological geology green kyanite macro metamorphic metamorphism mineral natural nature nordfjord norway norwegian oceanic omphacite ornamental plate pressure protolith pyrope pyropite pyroxene quartz quartzite rock sample specimen stone subduction tectonics ultrahigh