Orange crystal
Pseudomorphic crystal growth
Fluorspar crystals
Fluorite crystal specimen
Calcite crystal
Fluorite crystals on quartz, close up
Calcite
Calcite crystal rosettes
Fluorite crystals
Quartz encrusted calcite crystals
Prismatic amethyst crystal
Twinned fluorite crystals
Blue sapphire stone
Blue Sapphire uncut stone
Magnetite in quartz
Cuprocassiterite in quartz mica schist
Galenite and quartz crystals
Pyrolusite in quartz
Calcite on amethyst
Cordierite crystal
Spinel crystal
Sylvanite crystals
Mineral crystal
Cassiterite crystal
Geode, thin section micrograph
Amethyst
Green fluorite cubic crystal twins
Citrine gemstones and crystal
Fluorite crystal
Iron oxide precipitation in agate
Smoky quartz crystals
Rose quartz mineral, artwork
Opal gem necklace
Jade stone
Agate mineral rock cross section
Jasp agate stone
Jasp agate polished surface
Cabuchon gemstones of jasper
Egyptian jasper stone
Botswana agate stones
Round agate geode
Round agate thunderegg
Two agate thundereggs
Agate slice
Blue lace agate
Botswana agate stone
Dyed agate slice
Moss Agate stone
Amethyst geode
Amethyst stone
Banded Amethyst stone
Beryl stone
Chalcopyrite
Chiastolite stone
Garnet gemstone
Jasper polished stone
Amethyst filled geode
Cut and polished agate
Agate geode
Amethyst geode interior
Amethyst and chalcedony
Elbaite on albite and quartz
Schorl and quartz crystals in groundmass
Kyanite crystal
Garnet crystal and rock
Quartz crystals
Haematite mineral rock
Raw amethyst crystal
Raw citrine crystal
Mineral samples
Schorl tourmaline crystal stone
Emerald crystal in quartz
Silica rock crystal samples
Uncut diamond
Raw aquamarine crystal
Magnetite and calcite
Silver wire, mine specimen
Flourite crystal, Kirlian photograph
Quartz crystal
Corundum crystal
Torbernite crystal
Tourmaline crystals in quartz
Quartz crystal from Sentis, Switzerland.
Tremolite crystals
Quartz and cassiterite crystals
Childrenite crystal in quartz
Cobalt calcite mineral sample
Berzeliite mineral
Calcite spherulites
Amethyst crystals
Fluorite
Amethyst gemstones and crystal
Sphalerite and pyrite
Geode in thin section
Slice of agate
Concentric banding in agate
Turritella agate
Amethyst geodes
Aragonite crystals
Carnelian gemstone
Fuchsite mineral stone
Brecciated Jasper stone
Yellow Jasper
Labradorite rock crystals
Leopardskin jasper stone
Fire agate
Heat-treated amethyst
Limburgite
Quartz types
Dendritic crystals in chalcedony
Sapphire crystal
Citrine
Cubic fluorite
Purple fluorite crystals
Fluorite mineral
Chromite
Zeolite crystal
Fluorite in dolomite
Hollow agate with crystal
Quartz
Mica in quartz, light micrograph
Native gold
Crystals of haematite in quartz
Chalcopyrite and quartz crystals
Siderite mineral
Quartz in sphalerite
Molybdenite in quartz monzonite
Colourful crystals
Prasiolite mineral
Zeolite in quartz
Quartz polished stone
Hawk's Eye quartz stone
Tiger Eye quartz gemstone
Avanturine smooth gemstone
Beryl gem, cut stone
Quartz filled concretion
Tellurium in quartz
Hessite in quartz
Quartz vein in granite
Chabazite crystals in quartz
Native gold on quartz
Emerald in quartz