Quartz crystals
Tourmaline crystals in quartz
Quartz vein
Quartz crystal from Sentis, Switzerland.
Smoky quartz crystals
Smoky quartz
Quartz crystal
Quartz mineral
Citrine crystals
Rose quartz mineral, artwork
Amethyst crystals
Dendritic crystals in chalcedony
Amethyst crystals, light micrograph
Raw citrine crystal
Galenite and quartz crystals
Chabazite crystals in quartz
Quartz encrusted calcite crystals
Orthoclase and quartz crystals
Quartz crystals, SEM
Herkimer diamonds of quartz mineral
Quartz
Geode interior
Quartz mineral stone
Quartz polished stone
Green Avanturine Quartz gemstone
Smokey Quartz gemstone
Milky Quartz gemstone
Geode in thin section
Slice of agate
Specimen of rose quartz from Brazil
Quartzite metamorphic rock
Agate geode
Pyromorphite specimen
Siderite specimen
Iron oxide precipitation in agate
Agate mineral rock cross section
Jasp agate stone
Jasp agate polished surface
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 stone
Banded Amethyst stone
Amethyst
Beryl stone
Chalcopyrite
Chiastolite stone
Garnet gemstone
Jasper polished stone
Amethyst filled geode
Agate Bridge at Petrified Forest, Arizona
Cut and polished agate
Amethyst geode interior
Amethyst and chalcedony
Celestite crystals
Magnetite in quartz
Quartz in sphalerite
Molybdenite in quartz monzonite
Zeolite in quartz
Pyrolusite in quartz
Tiger Eye quartz gemstone
Quartz filled concretion
Tellurium in quartz
Hessite in quartz
Emerald crystal in quartz
Native gold on quartz
Emerald in quartz
Crystals of haematite in quartz
Cuprocassiterite in quartz mica schist
Hawk's Eye quartz stone
Geologist studying a quartz vein
Geologist logging a quartz vein
Colourful crystals
Quartz and cassiterite crystals
Cut agates
Rhyolitic geode
Geode interior section
Cabuchon gemstones of jasper
Amethyst geode
Labradorite rock crystals
Chalcopyrite and quartz crystals
Green calcite crystal
Jasper
Agate
Banded texture in agate
Jasper breccia rock
Calcite crystal
Calcite
Quartz vein in granite
Quartz crystal cluster
Mica in quartz, light micrograph
Deformed quartz veins in slate
Quartz monzonite
Quartz boulder
Brecciated quartz
Crackle quartz
Native gold
Citrine
Siderite mineral
Pseudomorphic crystal growth
Prasiolite mineral
Avanturine smooth gemstone
Beryl gem, cut stone
Schorl tourmaline crystal stone
Petrified Forest National Park, Arizona
Granite
Silica rock crystal samples
Glacial sand deposit
Graphic granite rock
Quartz crystal mineral
A specimen of quartz
Fluorite crystals on quartz, close up
Schorl and quartz crystals in groundmass
Aragonite crystals
Fuchsite mineral stone
Kyanite crystal
Iron dendrites in agate
Quartz crystal structure
Amethyst gemstones
Tourmaline quartz
Opal gemstone
Tourmaline in quartz