Paragneiss, light micrograph
Paragneiss
Quartz phyllite, light micrograph
Orthogneiss, light micrograph
Forbach granite, light micrograph
Amphibolite, light micrograph
Migmatite, light micrograph
Forbach granite
Rhyolite, light micrograph
Aplite, light micrograph
Brixen granite, light micrograph
Quartz phyllite
Staurolite crystal, light micrograph
Dolerite rock crystals, polarised LM
Lasa marble, light micrograph
Sample of biotite
Granite, light micrograph
Granodiorite, light micrograph
Two-mica granite
Rhyolite mountain, Iceland
Granite
Mica schist folds, polarised light LM
Brixen granite
Val Gardena sandstone, light micrograph
Sandstone in dusty matrix, polarised light micrograph
Rock mineral crystals, polarised LM
Mica schist folds, light micrograph
Quartz nodule, polarised light micrograph
Biotite in rock groundmass
Trachyte. polarised light micrograph
Melaphyr rock, light micrograph
Biotite
Biotite, Tyringham, Massachusetts, USA
Rhyolitic tuff, polarised light micrograph
Sandstone in chalcedony matrix, polarised light micrograph
Migmatite
Muscovite, polarised light micrograph
Ganister, polarised light micrograph
Basaltic dyke rock
Rhyolite
Matildite crystals, SEM
Peridotite rock
Olivine inclusion in basalt
Andesite rock, light micrograph
Quartz mineral stone, light micrograph
Basalt, light micrograph
Granite rock, light micrograph
Banded gneiss
Bunter sandstone, light micrograph
Limestone, light micrograph
Oolitic limestone, light micrograph
Granite, polarised light micrograph
Aplite, polarised light micrograph
Jasper, polarised light micrograph
Ammonite fossil, thin section
Quartz Diorite, LM of thin section
Fuchsite mineral stone
Polished sphere of orbicular jasper
Polished sphere of ocean jasper
Bedded tuff with two piles of volcanic ash
Peridotite, polarised light micrograph
Syenite, thin section, polarized LM
Mica in quartz, light micrograph
Muscovite and feldspar
Feldspathic gritstone
Grey orthoquartzite
Tubular hexagons of quartz
Granodiorite
Tourmaline in pegmatite host rock
Rhyolitic geode
Graphic granite rock, light micrograph
Agate. polarised light micrograph
Quartz porphyry rough
Grains of sand, light micrograph
Agglomerate rock, polarised LM
Columnar quartzite
Snowflake obsidian
Quartz crystals, SEM
Rose quartz crystals, SEM
Quartz crystal, SEM
Concentric banding in agate
Childrenite crystal in quartz
Anatextite gneiss
Garnet mica schist thin cut, polarised light micrograph
Sand grain, light micrograph
Sand grains, light micrograph
Hornfels, polarised light micrograph
Gneiss, light micrograph
Gneiss with garnet, light micrograph
Muschelkalk limestone, light micrograph
Crinoidal limestone, light micrograph