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