Hawk's Eye quartz stone
Schorl tourmaline crystal stone
Tourmaline crystals in quartz
Indicolite tourmaline faceted stone
Watermelon tourmaline crystalline stone
Tourmaline gemstone
Schorl and quartz crystals in groundmass
Tourmaline gemstones in quartz
Opal gem necklace
Elbaite on albite and quartz
Tiger Eye quartz gemstone
Amethyst
Amethyst geode
Quartz
Citrine
Tourmaline quartz
Quartz polished stone
Quartz filled concretion
Tourmaline in quartz
Black tourmaline in mica schist
Tourmaline
Watermelon tourmaline
Elbaite mineral
Dravite mineral
Elbaite mineral (tourmaline)
Amethyst geodes
Egyptian jasper stone
Botswana agate stones
Round agate geode
Round agate thunderegg
Two agate thundereggs
Agate slice
Blue lace agate
Botswana agate stone
Fuchsite mineral stone
Rubellite tourmaline pendant
Tourmaline crystals in quartzite
Tourmaline crystal specimen
Tourmaline crystal specimens
Tourmaline embedded in feldspar rock
Avanturine smooth gemstone
Blue sapphire stone
Blue Sapphire uncut stone
Jade stone
Granite specimen
Rutilated quartz
Quartz and green tourmaline crystals
Graphic tourmaline, light micrograph
Turritella agate
Carnelian gemstone
Garnet crystal and rock
Yellow Jasper
Leopardskin jasper stone
Quartz crystals
Quartz crystal
Raw tourmaline crystal
Tourmaline gemstones and crystal
Tourmaline crystal
Tourmaline in gneiss rock
Tourmaline Pegmatite
Garnet crystals on schist
Pyrargyrite crystals
Spotted Jasper stone
Opal
Verdite green tourmaline gemstone
Garnet gemstone
Amethyst filled geode
Amethyst geode interior
Amethyst crystals
Amethyst and chalcedony
Tourmaline crystal, thin section
Fire opal
Opalised fossil
Ironstone matrix with potch opal
Tourmaline schorl specimen
Ruby
Tourmaline on quartz
Bi-coloured tourmaline crystals
Tourmaline specimen
Quartz types
Opal mineral stone
Opal rock
Black opal gemstone
Smoky quartz crystals
Rose quartz mineral, artwork
Magnetite in quartz
Quartz in sphalerite
Molybdenite in quartz monzonite
Galenite and quartz crystals
Zeolite in quartz
Pyrolusite in quartz
Tellurium in quartz
Hessite in quartz
Emerald crystal in quartz
Quartz vein in granite
Chabazite crystals in quartz
Native gold on quartz
Emerald in quartz
Quartz encrusted calcite crystals
Orthoclase and quartz crystals
Mica in quartz, light micrograph
Crystals of haematite in quartz
Cuprocassiterite in quartz mica schist
Deformed quartz veins in slate
Quartz mineral stone
Smokey Quartz gemstone
'Black' opal cabochon specimen
Mineral samples
Quartz vein
Quartz crystal from Sentis, Switzerland.
Cut and polished jasper
Jasper
Mylonite, light micrograph
Rough pinkish-red Rubellite
Chalcopyrite and quartz crystals
Tourmaline cross section
Aventurine gemstone
Iron oxide precipitation in agate
Agate mineral rock cross section
Jasp agate stone
Jasp agate polished surface
Cabuchon gemstones of jasper
Dyed agate slice
Moss Agate stone
Amethyst stone
Banded Amethyst stone
Beryl stone
Calcite crystal
Calcite
Chalcopyrite
Chiastolite stone
Jasper polished stone
Kyanite crystal
Labradorite rock crystals
Cut and polished agate
Agate geode
Tourmaline in pegmatite host rock
Tourmaline unworked stones
Native gold