Emerald in quartz
Emerald crystal in quartz
Quartz encrusted calcite crystals
Galenite and quartz crystals
Tellurium in quartz
Hessite in quartz
Chabazite crystals in quartz
Native gold on quartz
Orthoclase and quartz crystals
Beryl gem, cut stone
Quartz vein
Quartz crystals
Quartz
Magnetite in quartz
Quartz in sphalerite
Quartz crystal from Sentis, Switzerland.
Crystals of haematite in quartz
Smoky quartz crystals
Rose quartz mineral, artwork
Agate mineral rock cross section
Jasp agate stone
Jasp agate polished surface
Egyptian jasper stone
Molybdenite in quartz monzonite
Zeolite in quartz
Pyrolusite in quartz
Quartz polished stone
Tiger Eye quartz gemstone
Quartz filled concretion
Tourmaline crystals in quartz
Quartz boulder
Brecciated quartz
Native gold
Pseudomorphic crystal growth
Colourful crystals
Silica rock crystal samples
Cuprocassiterite in quartz mica schist
Hawk's Eye quartz stone
Deformed quartz veins in slate
Botswana agate stones
Agate slice
Blue lace agate
Moss Agate stone
Banded Amethyst stone
Amethyst
Beryl stone
Calcite crystal
Calcite
Chalcopyrite
Garnet gemstone
Jasper polished stone
Agate geode
Amethyst geode interior
Citrine
Emerald crystal, close up
Quartz vein in granite
Rough emeralds
Quartz and cassiterite crystals
Mica in quartz, light micrograph
Iron oxide precipitation in agate
Round agate geode
Round agate thunderegg
Two agate thundereggs
Botswana agate stone
Dyed agate slice
Amethyst stone
Chiastolite stone
Amethyst filled geode
Cut and polished agate
Amethyst and chalcedony
Quartz crystal
Siderite mineral
Prasiolite mineral
Avanturine smooth gemstone
Schorl tourmaline crystal stone
Glacial sand deposit
Graphic granite rock
Granite
Quartz monzonite
Rutilated quartz
Cabuchon gemstones of jasper
Smoky quartz
Quartz mineral
Hyacinth quartz
Geologist studying a quartz vein
Geologist logging a quartz vein
Raw aquamarine crystal
Fuchsite mineral stone
Kyanite crystal
Amethyst crystals
Cassiterite crystal
Schorl and quartz crystals in groundmass
Emeralds
Fire agate
Dendritic crystals in chalcedony
Pyromorphite specimen
Siderite specimen
Geode interior
Quartz seam in schist
Jasper
Jasper breccia rock
Chalcopyrite and quartz crystals
Petrified Forest National Park, Arizona
Amethyst geode
Labradorite rock crystals
Herkimer diamonds
Prismatic amethyst crystal
Titanite crystals in actinolite
Quartz mineral stone, light micrograph
Quartz mineral stone
Turritella agate
Carnelian gemstone
Garnet crystal and rock
Brecciated Jasper stone
Yellow Jasper
Raw citrine crystal
Quartzite metamorphic rock
Citrine crystals
Agate Bridge at Petrified Forest, Arizona
Amethyst crystals, light micrograph
Quartz types
Quartz crystal cluster
Quartz crystals, SEM
Quartz crystal mineral
Two-mica granite
Red and white sandstone
Iron dendrites in agate
Opal gem necklace
Jade stone
Nephrite crystals
Grossular crystals in host rock
Pyrargyrite crystals
Herkimer diamonds of quartz mineral
Aquamarine crystals
Quartz stalactites
Green Avanturine Quartz gemstone
Smokey Quartz gemstone