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