Kyanite crystal
Garnet crystal and rock
Botswana agate stone
Aragonite crystals
Jasper polished stone
Brecciated Jasper stone
Yellow Jasper
Labradorite rock crystals
Fire agate
Carnelian gemstone
Spotted Jasper stone
Desert rose mineral clusters
Calcite crystal
Agate
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
Turritella agate
Agate slice
Blue lace agate
Dyed agate slice
Moss Agate stone
Amethyst geode
Amethyst geodes
Amethyst stone
Banded Amethyst stone
Amethyst
Beryl stone
Calcite
Chalcopyrite
Chiastolite stone
Fuchsite mineral stone
Garnet gemstone
Leopardskin jasper stone
Cut and polished agate
Amethyst filled geode
Agate geode
Copper
Agate. polarised light micrograph
Concentric banding in agate
Chalcedony
Cut agates
Geode interior
Rhyolitic geode
Geode interior section
Slice of agate
Amethyst and chalcedony
Agate Bridge at Petrified Forest, Arizona
Iron dendrites in agate
Green calcite crystal
Amethyst crystals
Geode, thin section micrograph
Hollow agate with crystal
Fluorite crystal specimen
Pseudomorphic crystal growth
Schorl tourmaline crystal stone
Emerald crystal in quartz
Silica rock crystal samples
Laguna agate
Moctezuma agate
Agua Nueva agate
Cryptocrystalline agate
Thunder egg agate
Fortification agate
Quartz vein in granite
Geode in thin section
Cross-section slice of Brazilian agate
Celestite crystals
Banded texture in agate
Quartz crystal from Sentis, Switzerland.
Smoky quartz crystals
Rose quartz mineral, artwork
Amethyst geode interior
Blue sapphire stone
Blue Sapphire uncut stone
Opal gem necklace
Jade stone
Mineral precipitation in agate
Brecciated agate
Brecciated agate rock
Agate stone with round whorls
Agate silica crystals in stone
Cross section of agate stone
Agate stone patterns
Lace agate stone
Agate cross section
Jasp agate cabuchon
Moss agate marble pattern
Cross section of hollow agate
Cross section of jasp agate
Cross section of agate
Agate polished cross section
Agate cabuchon stone
Triangular agate stone
Agate polished stone pattern
Agate stone with white layers
Agate stone with layers of colour
Fire or MexicAgate
Mocha agate with veined pattern
Agate with round centre
Agate thunderegg
Brecciated Agate stone
Agate cross section and layers
Agate stone cross section
Agate stone cross section and patterns
Flame agate stone pattern
Dolomite mineral
Gypsum stone
Haematite mineral rock
Agate specimen
Onyx
Agate surface
Citrine
Quartz
Mica in quartz, light micrograph
Native gold
Quartz crystals
Tourmaline crystals in quartz
Crystals of haematite in quartz
Chalcopyrite and quartz crystals
Magnetite in quartz
Cuprocassiterite in quartz mica schist