Aventurine
Aventurine gemstone
Quartz mineral stone
Quartz polished stone
Smokey Quartz gemstone
Sand
Dendrites in agate
Carnelian
Citrine.
Yellow crystal
Herkimer diamonds
Cut agate
Quartz crystals
Quartz crystal
Septarian nodule polished stone
Tiger eye gemstone
Tourmaline gemstones in quartz
Slice of dyed agate
Dyed agate slice
Azurite copper ore stone
Cut and polished jasper
Jasper
Egyptian jasper stone
Botswana agate stones
Round agate geode
Round agate thunderegg
Two agate thundereggs
Agate slice
Blue lace agate
Botswana agate stone
Citrine
Quartz
Hawk's Eye quartz stone
Tiger Eye quartz gemstone
Avanturine smooth gemstone
Schorl tourmaline crystal stone
Quartz filled concretion
Green Avanturine Quartz gemstone
Milky Quartz gemstone
Quartz monzonite
Quartz crystal mineral
A specimen of quartz
Crackle quartz
Citrine crystals
Rutile crystals
Quartz encrusted calcite crystals
Rutilated quartz
Fortification agate
Agate
Uncut emeralds
Smoky quartz crystals
Amethyst
Amethyst geode
Fuchsite mineral stone
Green calcite crystal
Celestite crystals
Specimen of rose quartz from Brazil
Banded texture in agate
Jasper breccia rock
Brecciated jasper
Opal gemstone
Quartz vein
Quartz boulder
Brecciated quartz
Quartzite rocks
Quartzite rocks covered in lichens
Tiger's eye mineral, light micrgraph
Mylonite, light micrograph
Mica inclusion
Quartz crystal from Sentis, Switzerland.
Pietersite semi-precious rock
Calcite crystal
Calcite
Rutile quartz
Crystals
Turritella agate
Amethyst geodes
Carnelian gemstone
Garnet crystal and rock
Yellow Jasper
Leopardskin jasper stone
Pyrolusite in quartz
Amethyst gemstones
Chrysoprase
Citrine quartz birthstone
blue apatite
Amethyst crystals
Hawk's Eye
Tiger's Eye
Agate, variety of mineral quartz
Slice of agate, a chalcedony form of quartz
Fire Opal
Star sapphire stone
Beryl stone
Raw citrine crystal
Pyromorphite specimen
Siderite specimen
Laguna agate
Moctezuma agate
Cryptocrystalline agate
Thunder egg agate
Vein agate
Agate mineral rock cross section
Jasp agate stone
Jasp agate polished surface
Amethyst filled geode
Amethyst geode interior
Cursed amethyst
Gneiss with garnet
Agate stone cross section and patterns
Flame agate stone pattern
Agate stone patterns
Three calcite crystals
Citrine jewel
Herkimer Diamond
Siderite mineral
Pseudomorphic crystal growth
Quartz in sphalerite
Molybdenite in quartz monzonite
Colourful crystals
Beryl gem, cut stone
Tellurium in quartz
Flint stone
Quartz-feldspar porphyry
Tourmaline crystals in quartz
Spotted Jasper stone
Chalcedony
Concentric banding in agate
Dendritic precipitation in an agate
Molecular model of quartz
Sedimentary rocks
Large citrine gemstone
Quartzite metamorphic rock
Polished carnelian stone
Polished tiger's eye stone
Red jasper mineral
Smoky quartz
Geode interior
Dendritic crystals in chalcedony
Quartz mineral
Agate geode
Chalcopyrite
Chrysocolla specimen
Amber citrine quartz stone
Cut and polished agate
Rock microveins, light micrograph
Iron oxide precipitation in agate