Geode interior
Agate geode
Geode interior section
Round agate geode
Amethyst filled geode
Rhyolitic geode
Botswana agate stones
Agate slice
Blue lace agate
Moss Agate stone
Banded Amethyst stone
Amethyst
Beryl stone
Chalcopyrite
Garnet gemstone
Jasper polished stone
Amethyst geode
Iron oxide precipitation in agate
Agate mineral rock cross section
Jasp agate stone
Jasp agate polished surface
Egyptian jasper stone
Round agate thunderegg
Two agate thundereggs
Botswana agate stone
Dyed agate slice
Amethyst stone
Chiastolite stone
Agate Bridge at Petrified Forest, Arizona
Cut and polished agate
Green calcite crystal
Calcite crystal
Calcite
Cut agates
Slice of agate
Celestite crystals
Agate
Banded texture in agate
Amethyst geode interior
Iron dendrites in agate
Dendritic crystals in chalcedony
Cabuchon gemstones of jasper
Geode in thin section
Agate surface
Amethyst and chalcedony
Fuchsite mineral stone
Kyanite crystal
Three calcite crystals
Quartz crystals
Quartz filled geode
Quartz vein
Agate thunderegg
Labradorite rock crystals
Agate stone cross section and patterns
Flame agate stone pattern
Agate stone patterns
Cut agate
Azurite copper ore stone
Chrysocolla specimen
Amber citrine quartz stone
Laguna agate
Agua Nueva agate
Concentric banding in agate
Agate lava geode
Turritella agate
Carnelian gemstone
Garnet crystal and rock
Brecciated Jasper stone
Yellow Jasper
Cross-section slice of Brazilian agate
Quartz crystal from Sentis, Switzerland.
Quartz crystal
Slice of dyed agate
Moctezuma agate
Cryptocrystalline agate
Thunder egg agate
Fortification agate
Mineral precipitate in agate
Pyromorphite specimen
Siderite specimen
Amethyst crystals
Amethyst geodes
Aragonite crystals
Leopardskin jasper stone
Fire agate
Spotted Jasper stone
Agate. polarised light micrograph
Mounted India dendritic agate
Smoky quartz
Citrine crystals
Quartz mineral
Tourmaline crystals in quartz
Geode, thin section micrograph
Raw citrine crystal
Quartzite metamorphic rock
Smoky quartz crystals
Rose quartz mineral, artwork
Amethyst crystals, light micrograph
Opal gem necklace
Jade stone
Amethyst crystals in an agate geode
Agate, artificially coloured
Polished Esterel rhyolite agate
Sard Onyx layered Agate
Brecciated Agate stone
Large quartz geode
Dendritic precipitation in an agate
Quartz mineral stone
Quartz polished stone
Magnetite in quartz
Citrine
Quartz in sphalerite
Emerald crystal in quartz
Petrified Forest National Park, Arizona
Granite
Emerald in quartz
Quartz encrusted calcite crystals
Carnelian agate
Blue sapphire stone
Blue Sapphire uncut stone
Polished carnelian stone