Sample of sandstone
Sample of shale
Samples of sandstone
Bunter sandstone
Sample of limestone
Sample of chalk
Sandstone
Erosion feature, Bluff, Utah, USA
Yellow Sandstone
Sandstone, Utah, USA
Greywacke
Quartz filled concretion
Bunter sandstone, light micrograph
Val Gardena sandstone
Sedimentary structures in sandstone
Val Gardena sandstone, light micrograph
Variety of Sedimentary Rocks
Pile of coal
Sedimentary Rocks
Cross-bedding in sandstone rock
Titanium deposits on a beach
Close up of a pattern in Sandstone, Utah
Sandstone specimen
Sample of granite
Sample of basalt
Magnification of grain of sandstone rock
Pink orthoquartzite
Septarian nodule polished stone
Mawsonite in sandstone
Gogotte, fossilised sandstone concretion
Mineral deposits in sandstone
Malachite
Twinned staurolite crystals
Basaltic dyke rock
Garnet crystals on schist
Cyamocypris fossilized in sandstone
Gogotte fossilised sandstone concretion, close-up
Agate with round centre
Ancient sand and shell layers
Cliffs at Handa Island, Scotland, UK
Sedimentary rocks
Cross section of jasp agate
Sandstone in dusty matrix, polarised light micrograph
Desert rose of gypsum crystals
Spriggina fossil
Labradorite
Sodalite
Tiger eye
Heap of sand
Eroded sandstone
Muscovite and feldspar
Bedding planes in Sandstone
Arkose, polarised light micrograph
Flint
Mudstone
Cross section of agate
Haematite group of stones
Cross section of hollow agate
Iron pyrite crystals
Marcasite.
Azurite crystals
Aragonite crystals
Blue lace agate
Jasper
Quartz
Quartz polished stone
Hope Chrysoberyl gemstone
Blue sapphire stone
Blue Sapphire uncut stone
Crystalline limestone rock
Opal gem necklace
Jade stone
Indicolite tourmaline faceted stone
Watermelon tourmaline crystalline stone
Hawk's Eye quartz stone
Tiger Eye quartz gemstone
Avanturine smooth gemstone
Schorl tourmaline crystal stone
Jasp agate cabuchon
Moss agate marble pattern
Agate polished stone pattern
Mocha agate with veined pattern
Egyptian jasper stone
Brecciated Agate stone
Agate cross section and layers
Agate stone cross section
Agate stone cross section and patterns
Flame agate stone pattern
Agate stone patterns
Round agate geode
Round agate thunderegg
Two agate thundereggs
Agate slice
Botswana agate stone
Copper
Dolomite mineral
Gypsum stone
Haematite tumblestone polished stone
Marcasite
Native copper
Pyrargyrite crystals
Calcite crystals
Sikhote-Alin meteorite fragment
Sample of gneiss
Onychiopsis fern fossilised in siltstone
Ganister, polarised light micrograph
Layered flysch sediments
Bouma sequence in flysch
Rock types
Sandstone in chalcedony matrix, polarised light micrograph
Jamesonite in rock groundmass
Banded flint
Assortment of Gemstones
Zoisite in pegmatite groundmass
Mudstone containing fossils, illustration
Heliotrope, or bloodstone
unakite gemstone
sodalite gemstone
rhodonite gemstone
Fossil raindrops on a sandstone rock
Weathered sandstone sea cliff
Devonian slates
Lignite
Flint and wood knife
Turritella agate
Fuchsite mineral stone
Coloured sandstone, Nevada, USA
Weathered sandstone boulder
Carnelian agate
Citrine
Fluorite
Cut and polished jasper
Opal
Peridot
Unakite mineral stone
Zeolite crystal
Silver wire, mine specimen
Agate polished cross section
Botswana agate stones
Haematite mineral rock
Sample of coal
Disintegrated Granite
Clay
Amethyst geode
Amethyst geodes
Leopardskin jasper stone
Sandstone rock strata
Blackchurch Rock, Devon, UK