Concentric banding in agate
Agate
Geode, thin section micrograph
Calcite crystal
Calcite
Fire agate
Botswana agate stone
Moss agate
Blue lace agate
Dendrites in agate
Citrine
Chalcedony
Turritella agate
Agate slice
Agate geode
Jasp agate stone
Jasp agate polished surface
Botswana agate stones
Round agate geode
Round agate thunderegg
Two agate thundereggs
Dyed agate slice
Moss Agate stone
Cut and polished agate
Iron oxide precipitation in agate
Agate mineral rock cross section
Almandine
Aragonite crystals
Garnet crystal and rock
Jasper polished stone
Brecciated Jasper stone
Yellow Jasper
Kyanite crystal
Labradorite rock crystals
Slice of agate
Cross-section slice of Brazilian agate
Quartz coated with silica
Agate. polarised light micrograph
Gypsum stone
Amethyst crystals
Tourmaline unworked stones
Prehnite and okenite
Cabuchon gemstones of jasper
Egyptian jasper stone
Amethyst geode
Amethyst geodes
Amethyst stone
Banded Amethyst stone
Amethyst
Beryl stone
Chalcopyrite
Chiastolite stone
Carnelian gemstone
Fuchsite mineral stone
Garnet gemstone
Leopardskin jasper stone
Amethyst filled geode
Pallasite meteorite fragment
Ruby in zoisite
Zircon crystals on host rock
Tourmaline cross section
Tourmaline
Tourmaline on quartz
Rough pinkish-red Rubellite
Rare bright green Uvarovite Garnet
Smoky quartz
Fortification agate
Quartz crystals, SEM
Zinnwaldite mineral group
Quartz crystal, SEM
Spotted Jasper stone
Agate specimen
Brecciated agate
Agate thunderegg
Iron dendrites in agate
Mineral precipitation in agate
Brecciated agate rock
Agate stone patterns
Lace agate stone
Agate cross section
Jasp agate cabuchon
Moss agate marble pattern
Cross section of agate
Agate polished cross section
Agate cabuchon stone
Triangular agate stone
Agate polished stone pattern
Hollow agate with crystal
Agate with round centre
Brecciated Agate stone
Agate stone cross section
Flame agate stone pattern
Agate surface
Agate stone with round whorls
Agate silica crystals in stone
Cross section of agate stone
Cross section of hollow agate
Cross section of jasp agate
Agate stone with white layers
Mocha agate with veined pattern
Agate cross section and layers
Mounted India dendritic agate
Agate stone with layers of colour
Agate stone cross section and patterns
Agate Bridge at Petrified Forest, Arizona
Axinite
Chrysocolla mineral
Beryl crystals
Pink beryl crystal, SEM
Raw garnet crystal
Tourmaline crystal, thin section
Carnelian
Agate lava geode
Desert rose mineral clusters
Cut agates
Geode interior
Rhyolitic geode
Geode interior section
Rose Quartz
Quartz encrusted calcite crystals
Polished Esterel rhyolite agate
Twinned augite crystals
Dendritic mineralisations in chalcedony
Citrine crystal group
Septarian nodule surface
Agate objects
Blue sapphire stone
Blue Sapphire uncut stone
Opal gem necklace
Jade stone
Amethyst and chalcedony
Opalised fossil
Rhodonite
Fire Opal
Feldspar and quartz