Amethyst
Banded Amethyst stone
Amethyst filled geode
Amethyst stone
Dyed agate slice
Amethyst geode
Amethyst and chalcedony
Round agate geode
Iron oxide precipitation in agate
Agate mineral rock cross section
Jasp agate stone
Jasp agate polished surface
Egyptian jasper stone
Botswana agate stones
Round agate thunderegg
Two agate thundereggs
Agate slice
Blue lace agate
Botswana agate stone
Moss Agate stone
Beryl stone
Chalcopyrite
Chiastolite stone
Garnet gemstone
Jasper polished stone
Cut and polished agate
Agate geode
Amethyst geodes
Calcite crystal
Calcite
Geode interior
Cabuchon gemstones of jasper
Amethyst geode interior
Agate Bridge at Petrified Forest, Arizona
Geode interior section
Fuchsite mineral stone
Kyanite crystal
Labradorite rock crystals
Green calcite crystal
Celestite crystals
Agate
Banded texture in agate
Amethyst crystals
Agate in amethyst
Cut agates
Rhyolitic geode
Slice of agate
Laguna agate
Moctezuma agate
Agua Nueva agate
Cryptocrystalline agate
Thunder egg agate
Fortification agate
Concentric banding in agate
Amethyst crystals, light micrograph
Turritella agate
Aragonite crystals
Carnelian gemstone
Garnet crystal and rock
Brecciated Jasper stone
Yellow Jasper
Leopardskin jasper stone
Fire agate
Prismatic amethyst crystal
Iron dendrites in agate
Dendritic crystals in chalcedony
Smoky quartz crystals
Rose quartz mineral, artwork
Opal gem necklace
Jade stone
Quartz crystals
Agate surface
Agate thunderegg
Mounted India dendritic agate
Spotted Jasper stone
Agate. polarised light micrograph
Agate stone cross section and patterns
Flame agate stone pattern
Agate stone patterns
Three calcite crystals
Cursed amethyst
Cross-section slice of Brazilian agate
Blue sapphire stone
Blue Sapphire uncut stone
Quartz vein
Quartz crystal from Sentis, Switzerland.
Amethyst crystals in an agate geode
Geode in thin section
Jasper
Jasper breccia rock
Cut agate
Slice of dyed agate
Azurite copper ore stone
Chrysocolla specimen
Amber citrine quartz stone
Mineral precipitate in agate
Quartz
Native gold
Magnetite in quartz
Cuprocassiterite in quartz mica schist
Citrine
Siderite mineral
Pseudomorphic crystal growth
Quartz in sphalerite
Molybdenite in quartz monzonite
Galenite and quartz crystals
Colourful crystals
Prasiolite mineral
Zeolite in quartz
Pyrolusite in quartz
Quartz polished stone
Hawk's Eye quartz stone
Tiger Eye quartz gemstone
Avanturine smooth gemstone
Beryl gem, cut stone
Schorl tourmaline crystal stone
Quartz filled concretion
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
Silica rock crystal samples
Orthoclase and quartz crystals
Tourmaline crystals in quartz
Glacial sand deposit
Graphic granite rock