Colourful crystals
Quartz encrusted calcite crystals
Galenite and quartz crystals
Chabazite crystals in quartz
Orthoclase and quartz crystals
Agate mineral rock cross section
Jasp agate stone
Jasp agate polished surface
Egyptian jasper stone
Pseudomorphic crystal growth
Tellurium in quartz
Quartz crystals
Tourmaline crystals in quartz
Crystals of haematite in quartz
Native gold
Hessite in quartz
Emerald crystal in quartz
Native gold on quartz
Emerald in quartz
Silica rock crystal samples
Smoky quartz crystals
Amethyst filled geode
Amethyst geode interior
Botswana agate stones
Round agate geode
Round agate thunderegg
Two agate thundereggs
Agate slice
Blue lace agate
Botswana agate stone
Quartz
Siderite mineral
Quartz in sphalerite
Molybdenite in quartz monzonite
Beryl gem, cut stone
Citrine
Quartz polished stone
Hawk's Eye quartz stone
Tiger Eye quartz gemstone
Avanturine smooth gemstone
Schorl tourmaline crystal stone
Quartz filled concretion
Quartz vein
Quartz crystal from Sentis, Switzerland.
Cabuchon gemstones of jasper
Iron oxide precipitation in agate
Rose quartz mineral, artwork
Dyed agate slice
Moss Agate stone
Amethyst stone
Banded Amethyst stone
Amethyst
Beryl stone
Calcite crystal
Calcite
Chalcopyrite
Chiastolite stone
Garnet gemstone
Jasper polished stone
Cut and polished agate
Agate geode
Amethyst and chalcedony
Magnetite in quartz
Cuprocassiterite in quartz mica schist
Prasiolite mineral
Zeolite in quartz
Pyrolusite in quartz
Glacial sand deposit
Graphic granite rock
Granite
Quartz boulder
Brecciated quartz
Amethyst crystals
Nephrite crystals
Labradorite rock crystals
Pyrargyrite crystals
Quartz and cassiterite crystals
Titanite crystals in actinolite
Schorl and quartz crystals in groundmass
Citrine crystals
Quartz monzonite
Herkimer diamonds
Amethyst geode
Fuchsite mineral stone
Dendritic crystals in chalcedony
Amethyst crystals, light micrograph
Mica in quartz, light micrograph
Quartz vein in granite
Deformed quartz veins in slate
Chalcopyrite and quartz crystals
Fire agate
Raw citrine crystal
Pyromorphite specimen
Siderite specimen
Quartz crystal
Jasper
Jasper breccia rock
Grossular crystals in host rock
Aragonite crystals
Tremolite crystals
Kyanite crystal
Prismatic amethyst crystal
Cassiterite crystal
Rutilated quartz
Opal gem necklace
Jade stone
Azurite crystals
Turritella agate
Amethyst geodes
Carnelian gemstone
Garnet crystal and rock
Yellow Jasper
Leopardskin jasper stone
Quartzite metamorphic rock
Smoky quartz
Geode interior
Quartz mineral
Agate Bridge at Petrified Forest, Arizona
Garnet crystals on schist
Grossular garnet crystals on rock surface
Sphene crystals in groundmass, close-up
Geologist studying a quartz vein
Geologist logging a quartz vein
Petrified Forest National Park, Arizona
Hyacinth quartz
Rough emeralds
Quartz crystals, SEM
Andradite crystals
Topaz crystals
Brecciated Jasper stone
Blue sapphire stone
Blue Sapphire uncut stone
Almandine crystals in schist