Quartz crystals
Tourmaline crystals in quartz
Quartz crystal
Smoky quartz
Quartz mineral
Quartz vein
Citrine crystals
Smoky quartz crystals
Amethyst crystals
Quartz crystal from Sentis, Switzerland.
Dendritic crystals in chalcedony
Geode interior
Rose quartz mineral, artwork
Amethyst crystals, light micrograph
Quartz encrusted calcite crystals
Agate geode
Pyromorphite specimen
Siderite specimen
Moss Agate stone
Banded Amethyst stone
Amethyst
Beryl stone
Chalcopyrite
Garnet gemstone
Jasper polished stone
Amethyst geode interior
Botswana agate stones
Agate slice
Blue lace agate
Geode interior section
Quartz
Quartz mineral stone
Quartz polished stone
Cut agates
Slice of agate
Galenite and quartz crystals
Chabazite crystals in quartz
Orthoclase and quartz crystals
Quartz crystals, SEM
Herkimer diamonds of quartz 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
Green Avanturine Quartz gemstone
Milky Quartz gemstone
Smokey Quartz gemstone
Magnetite in quartz
Quartz in sphalerite
Emerald crystal in quartz
Emerald in quartz
Geode in thin section
Specimen of rose quartz from Brazil
Celestite crystals
Fluorite crystals on quartz, close up
Schorl and quartz crystals in groundmass
Rhyolitic geode
Green calcite crystal
Molybdenite in quartz monzonite
Zeolite in quartz
Pyrolusite in quartz
Tellurium in quartz
Hessite in quartz
Native gold on quartz
Quartz and cassiterite crystals
Tiger Eye quartz gemstone
Quartz filled concretion
Crystals of haematite in quartz
Tourmaline quartz
Cuprocassiterite in quartz mica schist
Geologist studying a quartz vein
Geologist logging a quartz vein
Hawk's Eye quartz stone
Colourful crystals
Tourmaline in quartz
Calcite crystal
Calcite
Amethyst gemstones
Deformed quartz veins in slate
Jasper
Agate
Banded texture in agate
Jasper breccia rock
Petrified Forest National Park, Arizona
Granite
Citrine
Cabuchon gemstones of jasper
Quartz vein in granite
Amethyst geode
Prismatic amethyst crystal
Mica in quartz, light micrograph
Quartz crystal mineral
Amber citrine quartz stone
Quartz crystal cluster
Tourmaline gemstones in quartz
Quartz crystal structure
Iron dendrites in agate
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
Molecular model of quartz
Rutile quartz
Polished carnelian stone
Polished tiger's eye stone
Red jasper mineral
Crackle quartz