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