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