Pseudomorphic crystal growth
Chalcopyrite
Chalcopyrite and quartz crystals
Emerald crystal in quartz
Silica rock crystal samples
Agate mineral rock cross section
Jasp agate stone
Jasp agate polished surface
Egyptian jasper stone
Calcite crystal
Quartz crystal from Sentis, Switzerland.
Native gold
Galenite and quartz crystals
Colourful crystals
Tellurium in quartz
Hessite in quartz
Chabazite crystals in quartz
Native gold on quartz
Emerald in quartz
Quartz encrusted calcite crystals
Orthoclase and quartz crystals
Cuprocassiterite in quartz mica schist
Schorl tourmaline crystal stone
Orange crystal
Cabuchon gemstones of jasper
Kyanite crystal
Quartz vein
Quartz crystals
Crystals of haematite in quartz
Fluorite crystals on quartz, close up
Iron oxide precipitation in agate
Smoky quartz crystals
Rose quartz mineral, artwork
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 stone
Banded Amethyst stone
Amethyst
Beryl stone
Calcite
Chiastolite stone
Garnet gemstone
Jasper polished stone
Amethyst filled geode
Cut and polished agate
Agate geode
Amethyst geode interior
Amethyst and chalcedony
Fluorite crystals
Quartz
Magnetite in quartz
Citrine
Siderite mineral
Quartz in sphalerite
Molybdenite in quartz monzonite
Prasiolite mineral
Zeolite in quartz
Pyrolusite in quartz
Quartz polished stone
Hawk's Eye quartz stone
Tiger Eye quartz gemstone
Avanturine smooth gemstone
Beryl gem, cut stone
Quartz filled concretion
Tourmaline crystals in quartz
Glacial sand deposit
Graphic granite rock
Granite
Quartz boulder
Brecciated quartz
Fire agate
Cassiterite crystal
Garnet crystal and rock
Amethyst geode
Fuchsite mineral stone
Labradorite rock crystals
Amethyst crystals
Quartz crystal
Raw citrine crystal
Mica in quartz, light micrograph
Quartz vein in granite
Deformed quartz veins in slate
Fluorite
Fluorite crystal specimen
Prismatic amethyst crystal
Twinned fluorite crystals
Fluorspar crystals
Hyacinth quartz
Jasper
Jasper breccia rock
Rutilated quartz
Quartz and cassiterite crystals
Quartz monzonite
Herkimer diamonds
Turritella agate
Amethyst geodes
Aragonite crystals
Carnelian gemstone
Brecciated Jasper stone
Yellow Jasper
Leopardskin jasper stone
Chalcopyrite, SEM
Quartzite metamorphic rock
Smoky quartz
Citrine crystals
Geode interior
Dendritic crystals in chalcedony
Quartz mineral
Pyromorphite specimen
Siderite specimen
Agate Bridge at Petrified Forest, Arizona
Amethyst crystals, light micrograph
Cobaltite and chalcopyrite crystals
Green fluorite cubic crystal twins
Quartz crystal cluster
Geologist studying a quartz vein
Geologist logging a quartz vein
Petrified Forest National Park, Arizona
Mineral epimorphosis II
Mineral epimorphosis I
Opal gem necklace
Jade stone