Clay
Sample of shale
Sepiolite clay mineral
Malachite
Twinned staurolite crystals
Labradorite
Sodalite
Tiger eye
Native silver
Campo del Cielo meteorite fragment
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
Basaltic dyke 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
Cross section of jasp agate
Agate polished stone pattern
Mocha agate with veined pattern
Agate with round centre
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
Amethyst geode
Amethyst geodes
Copper
Dolomite mineral
Gypsum stone
Haematite tumblestone polished stone
Leopardskin jasper stone
Quartz filled concretion
Garnet crystals on schist
Marcasite
Native copper
Pyrargyrite crystals
Calcite crystals
Sikhote-Alin meteorite fragment
Sample of sandstone
Sample of basalt
Sample of limestone
Sample of chalk
Hydrated copper sulphate crystals
Copper sulphate crystal
Bentonite
Carnelian agate
Amethyst
Citrine
Fluorite
Cut and polished jasper
Opal
Peridot
Ruby
Unakite mineral stone
Zeolite crystal
Silver wire, mine specimen
Cross section of hollow agate
Cross section of agate
Agate polished cross section
Botswana agate stones
Turritella agate
Desert rose mineral clusters
Carnelian gemstone
Fuchsite mineral stone
Garnet crystal and rock
Haematite mineral rock
Haematite group of stones
Yellow Jasper
Heliotrope, or bloodstone
unakite gemstone
sodalite gemstone
rhodonite gemstone
Rutilated quartz
Canyon Diablo meteorite fragment
Sample of clay
Montmorillonite crystals in bentonite
Assortment of Gemstones
Hawk's Eye
Carnelia
Tiger's Eye
leopard skin
Red Jasper
rose quartz
Zoisite in pegmatite groundmass
Meteorite NWA 5702
Tourmaline gemstone
Spotted Jasper stone
Desert rose of gypsum crystals
Agate objects
Barringer Crater rock samples
Haematite
Aventurine gemstone
Covellite in clay groundmass, close-up
Canyon Diablo meteorite
Star sapphire stone
Smokey Quartz gemstone
Dioptase
Sand
Enstatite
Jamesonite in rock groundmass
Loess rough
Quartz porphyry rough
Dendritic mineralisations in chalcedony
Bronze Age tools and utensils, artwork
Macrophotograph of high purity cobalt
Holsinger Meteorite
Sample of granite
Quartz mineral stone
Red sandstone
Quartz seam in schist
Mudstone
Cut agate
Quartz crystals
Assortment of semiprecious gemstone
Smoky quartz crystals
Septarian nodule polished stone
Padparadscha gemstone
Slice of dyed agate
Dyed agate slice
Aragonite (Sprudelstein)
Obsidian
Flos-ferris Aragonite
Clay Soil
Boulder clay
Green apophyllite
Clay Concretion, Vermont, USA
Conichalcite and adamite
Carnelian
Opal rock
Black opal gemstone
Sard Onyx layered Agate
Snowflake obsidian
Syenite