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