Amethyst and chalcedony
Amethyst geode
Amethyst filled geode
Amethyst
Amethyst geodes
Amethyst geode interior
Amethyst crystals
Prismatic amethyst crystal
Amethyst crystals, light micrograph
Heat-treated amethyst
Cursed amethyst
Agate in amethyst
Garnet gemstone
Quartz types
Amethyst stone
Raw amethyst crystal
Calcite on amethyst
Banded Amethyst stone
Amethyst gemstones and crystal
Single amethyst crystal, close up
Amethyst gemstones
Mass of pyramid-shaped amethyst crystals
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 geode
Round agate thunderegg
Two agate thundereggs
Agate slice
Blue lace agate
Botswana agate stone
Dyed agate slice
Moss Agate stone
Beryl stone
Chalcopyrite
Chiastolite stone
Jasper polished stone
Cut and polished agate
Agate geode
Amethyst crystals in an agate geode
Blue sapphire stone
Blue Sapphire uncut stone
Opal gem necklace
Jade stone
Amethyst, SEM
Dendritic crystals in chalcedony
Calcite crystal
Calcite
Fuchsite mineral stone
Kyanite crystal
Labradorite rock crystals
Tourmaline crystals in quartz
Citrine
Hawk's Eye quartz stone
Schorl tourmaline crystal stone
Amethyst gem
Geode, thin section micrograph
Turritella agate
Aragonite crystals
Carnelian gemstone
Garnet crystal and rock
Brecciated Jasper stone
Yellow Jasper
Leopardskin jasper stone
Fire agate
Amethyst, a quartz crystal
Smoky quartz crystals
Rose quartz mineral, artwork
Tool holding amethyst gemstone
Quartz crystals
Cut agates
Geode interior
Rhyolitic geode
Geode interior section
Geode in thin section
Slice of agate
Agate Bridge at Petrified Forest, Arizona
Schorl and quartz crystals in groundmass
Amethyst quartz birthstone
Citrine crystals
Amethyst druse (crystals in a rock cavity)
Spotted Jasper stone
Agate. polarised light micrograph
Raw citrine crystal
Amethyst gemstone
Oval cut amethyst
Round cut amethyst
Pear cut amethyst
Square cut purple Amethyst gemstone
Concentric banding in agate
Chalcedony
Elbaite on albite and quartz
Jasper
Jasper breccia rock
Citrine gemstones and crystal
Quartz
Mica in quartz, light micrograph
Native gold
Crystals of haematite in quartz
Magnetite in quartz
Cuprocassiterite in quartz mica schist
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
Tiger Eye quartz gemstone
Avanturine smooth gemstone