Brecciated quartz
Quartz boulder
Quartz seam in schist
Crystals of haematite in quartz
Silica rock crystal samples
Red sandstone
Red and white sandstone
Conglomerate rock
Two-mica granite
Quartz monzonite
Jasper
Jasper breccia rock
Herkimer diamonds
Galenite and quartz crystals
Tellurium in quartz
Hessite in quartz
Chabazite crystals in quartz
Native gold on quartz
Orthoclase and quartz crystals
Quartz
Emerald crystal in quartz
Emerald in quartz
Quartz encrusted calcite crystals
Smoky quartz crystals
Rose quartz mineral, artwork
Quartz crystals
Quartz stalactites
Quartz and schist outcrops
Molybdenite in quartz monzonite
Zeolite in quartz
Pyrolusite in quartz
Tourmaline crystals in quartz
Quartz polished stone
Tiger Eye quartz gemstone
Quartz filled concretion
Egyptian jasper stone
Cuprocassiterite in quartz mica schist
Quartz vein in gneiss rock
Hawk's Eye quartz stone
Native gold
Pseudomorphic crystal growth
Colourful crystals
Green Avanturine Quartz gemstone
Milky Quartz gemstone
Smokey Quartz gemstone
Magnetite in quartz
Quartz in sphalerite
Quartz vein
Crackle quartz
Agate mineral rock cross section
Jasp agate stone
Jasp agate polished surface
Specimen of rose quartz from Brazil
A specimen of quartz
Quartz crystal from Sentis, Switzerland.
Quartz vein in granite
Hydrothermal quartz vein
Mica in quartz, light micrograph
Iron oxide precipitation in agate
Laguna agate
Moctezuma agate
Agua Nueva agate
Cryptocrystalline agate
Thunder egg agate
Vein agate
Chrysoprase
Dyed agate slice
Amethyst stone
Chiastolite stone
Amethyst filled geode
Fortification agate
Cut and polished agate
Cursed amethyst
Amethyst and chalcedony
Round agate geode
Round agate thunderegg
Two agate thundereggs
Agate slice
Blue lace agate
Botswana agate stone
Quartz mineral stone
Siderite mineral
Prasiolite mineral
Hertfordshire puddingstone
Beryl gem, cut stone
Aventurine
Pile of sand
Glacial sand deposit
Graphic granite rock
Granite
Avanturine smooth gemstone
Schorl tourmaline crystal stone
Quartz crystal mineral
Deformed quartz veins in slate
Moss Agate stone
Banded Amethyst stone
Amethyst
Beryl stone
Calcite crystal
Calcite
Chalcopyrite
Garnet gemstone
Jasper polished stone
Agate
Agate geode
Amethyst geode interior
Concentric banding in agate
Cut and polished jasper
Botswana agate stones
Celestite crystals
Banded texture in agate
Aventurine gemstone
Rutile crystals
Sand, SEM
Citrine
Rhyolite mountain, Iceland
Rose quartz crystals, SEM
Brecciated Jasper stone
Quartzite rocks
Quartzite rocks covered in lichens
Tiger's eye mineral, light micrgraph
Mylonite, light micrograph
Mica inclusion
Sand
Hyacinth quartz
Quartz and cassiterite crystals
Rutilated quartz
Cabuchon gemstones of jasper
Green calcite crystal
Schorl and quartz crystals in groundmass
Smoky quartz
Quartz mineral
Chalcopyrite and quartz crystals
Pietersite semi-precious rock
Citrine.
Fire agate
Asscher cut diamond gemstone
Pink diamonds
Citrine crystals
Tiger's eye and Hawk's eye gemstones
Labradorite rock crystals
Amethyst geode
Molecular model of quartz
Quartz-feldspar porphyry
Quartz vein in schist
Mining core sample, Kenya
Opal gemstone
Geologist studying a quartz vein