Quartz mineral
Quartz crystals
Smoky quartz
Tourmaline crystals in quartz
Rose quartz mineral, artwork
Quartz crystal
Quartz vein
Quartz crystal from Sentis, Switzerland.
Citrine crystals
Geode interior
Smoky quartz crystals
Herkimer diamonds of quartz mineral
Geode interior section
Agate mineral rock cross section
Quartz mineral stone
Quartzite metamorphic rock
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
Green Avanturine Quartz gemstone
Milky Quartz gemstone
Quartz polished stone
Smokey Quartz gemstone
Specimen of rose quartz from Brazil
Geode in thin section
Slice of agate
Raw citrine crystal
Dendritic crystals in chalcedony
Agate geode
Pyromorphite specimen
Siderite specimen
Jasp agate stone
Jasp agate polished surface
Moss Agate stone
Banded Amethyst stone
Amethyst
Beryl stone
Chalcopyrite
Garnet gemstone
Jasper polished stone
Amethyst geode interior
Botswana agate stones
Cut agates
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
Tiger Eye quartz gemstone
Quartz filled concretion
Siderite mineral
Prasiolite mineral
Quartz crystals, SEM
Tourmaline quartz
Cuprocassiterite in quartz mica schist
Geologist studying a quartz vein
Geologist logging a quartz vein
Hawk's Eye quartz stone
Tourmaline in quartz
Red jasper mineral
Rhyolitic geode
Fluorite crystals on quartz, close up
Schorl and quartz crystals in groundmass
Celestite crystals
Jasper
Agate
Banded texture in agate
Jasper breccia rock
Magnetite in quartz
Quartz in sphalerite
Emerald crystal in quartz
Emerald in quartz
Quartz encrusted calcite crystals
Amethyst geode
Quartz vein in granite
Mica in quartz, light micrograph
Crystals of haematite in quartz
Quartz crystal structure
Green calcite crystal
Quartz crystal mineral
Native gold
Pseudomorphic crystal growth
Colourful crystals
Beryl gem, cut stone
Petrified Forest National Park, Arizona
Silica rock crystal samples
Glacial sand deposit
Graphic granite rock
Granite
Avanturine smooth gemstone
Schorl tourmaline crystal stone
Molecular model of quartz
Calcite crystal
Calcite
Quartz monzonite
Quartz boulder
Brecciated quartz
Crackle quartz
Cabuchon gemstones of jasper
Polished carnelian stone
Polished tiger's eye stone
Amethyst gemstones
Calcite on amethyst
Deformed quartz veins in slate
Opal gem necklace
Jade stone
Mineral crystal
A specimen of quartz
Mineral precipitate in agate
Citrine
Tiger's eye mineral, light micrgraph
Rutile quartz