Slate
Slate, Brattleboro, Vermont, USA
Welsh slate, close up
A piece of natural slate
Slate roofing
Variety of Metamorphic Rocks
Slate showing stratum lines, full frame
Andelusite crystals in slate
Slate with pyrite
Deformed quartz veins in slate
Cubic zirconia
Slate mining
Slate outcrop, France
Tourmaline mica in slate
Chert, a type of sedimentary rock
Lignite, Brandon, Vermont, USA
Coal Essex Junction, Vermont, USA
Rock types
Red Shale
Shale with fossilized ripple marks
Close up of a pattern in Sandstone, Utah
A piece of black shale, close-up
Fossil Starfish preserved in Shale
Sandstone
Shale
Sandstone, Utah, USA
Shale, California, USA
Calcareous mudstone
Green marl
Stalactite
Devonian slates
Shale, close-up
Banded flint
Shale specimen
Spotted slate
Slate roof tiles, full frame
Black and red banded Ironstone
Dolomite
Septarian concretion in claystone
Greywacke
Limestone specimen
Arkose, a sedimentary rock
Yellow Sandstone
Sedimentary Rocks
Arkose, a sedimentary rock, Massachusetts
Septarian nodule
Limestone rock, close up
Sedimentary rock concretion
Cross-bedding in sandstone rock
Gypsum rock
Sandstone rock formation, South Africa
Concretion of sand and iron on Dinosaur Ridge, Colorado, USA
Slate chippings
Fossil raindrops on a sandstone rock
Anthracite
Sample of sandstone
Sample of shale
Calcite in mudstone
Shiitake mushrooms on a grey slate surface
Coprolite fossilized dung
Folds of calcite in limestone rock
Pink orthoquartzite
Bunter sandstone
Flute marks on mudstone
Whole and sliced red chilli pepper on slate
Pyrite crystals on Shale
Ornamental pond in garden
Cannel Coal, Kentucky, USA
Magnification of grain of sandstone rock
Heap of ground coal
English stonecrop
Gneiss
Chamosite in rock groundmass
Jamesonite in rock groundmass, close-up
Halloysite, a form of Kaolinite
Crinoid fossil (Onychocrinus exculptus)
Jamesonite in rock groundmass
Dendrites on Sandstone, California, USA
工場の非常階段
Near metallic lustre of anthracite rock
ストーン
スレート
Onychiopsis fern fossilised in siltstone
Jet (lignite) rough
Spriggina fossil
Andalusite, Lancaster, Massachusetts, USA
Smoky Quartz crystal
Barite
Rutile crystals, Brazil
Aragonite crystals
TRILOBITE
Trilobite Fossil
Fossil Catfish
Augen Gneiss
Fossil Shrimp (Penaeus speciosus)
Pile of coal
slate
background of coal
Taipei,Wanli,Guihou Rock Bank,rock pattern
Samples of sandstone
Variety of Sedimentary Rocks
Shale, close up
Archimedes screw-like axis supported
Ammonite fossils
Reindeer antler baton
Aframomum
Disintegrated Granite
Flint
Fluorite
町工場のスレートの屋根
Sample of limestone
Sample of coal
Sandstone specimen
Lignite Coal specimen
Flint and Chalk, Dover, England
Bituminous Coal, Pittsburgh, Pennsylvania
Anthracite Coal, Pennsylvania, USA
Flint stone
Overhead view of hollandaise sauce with eggs benedict breakfast on slate
Fossiliferous Limey Shale, New York, USA
Quartz filled concretion
Mawsonite in sandstone
Retiolites fossil on shale
Coral limestone
工場の傷んだスレート葺きの屋根
Anthracite coal
Polarised LM of thin section of greywacke
Barite, Springfield, Vermont, USA
Shelly limestone, polarised LM
Limestone, light micrograph
Limestone
Rock strata
Rock salt
Conical hill
Stalactites
Banded flint from Ilza, Poland
Chalk cliffs, south-east England
Surface flint, Sussex, UK
Gogotte, fossilised sandstone concretion
Technique for creating a flint tool
Limestone with Turritella shell fossils
Limestone with fossilised shells
Limestone cliffs, Warrnambool, Victoria
Sand
Talc, Holly Springs, Georgia, USA
Muscovite Mica, Ontario, Canada
Muscovite Mica
Stromatolite, Fort Cassin, Vermont, USA
Energy
Overhead view of tortilla wraps with chips and salad on slate
An avocado on a slate platter against a black background
Blueberries on spoon
Chlorite Schist rounded by water erosion
Archaeocyathid,
Carpopenaeus fossil
Feldspar
Axinite crystals
Willemite
Gmelinite
Tiger's-eye variety of Chalcedony, Africa
Jasper specimen
Calcite crystals
Fluorite specimen