Tourmaline crystals in quartz
Schorl tourmaline crystal stone
Hawk's Eye quartz stone
Schorl and quartz crystals in groundmass
Tourmaline quartz
Tourmaline
Tourmaline in quartz
Watermelon tourmaline
Tourmaline crystals in quartzite
Indicolite tourmaline faceted stone
Watermelon tourmaline crystalline stone
Elbaite mineral (tourmaline)
Elbaite on albite and quartz
Black tourmaline in mica schist
Quartz and green tourmaline crystals
Rubellite tourmaline pendant
Tourmaline crystal specimen
Tourmaline crystal specimens
Tourmaline gemstones in quartz
Tourmaline embedded in feldspar rock
Tourmaline gemstone
Elbaite mineral
Dravite mineral
Tourmaline crystal
Tourmaline Pegmatite
Raw tourmaline crystal
Tourmaline gemstones and crystal
Tourmaline in gneiss rock
Graphic tourmaline, light micrograph
Bi-coloured tourmaline crystals
Verdite green tourmaline gemstone
Tourmaline crystal, thin section
Granite specimen
Tourmaline schorl specimen
Tourmaline specimen
Quartz crystals
Tourmaline on quartz
Opal gem necklace
Amethyst crystals
Tourmaline crystals
Tourmaline gemstones
Smoky quartz crystals
Tourmaline crystals in matrix
Tourmaline crystals on Albite
Blue tourmaline crystals
Tourmaline Crystals, Minas Gerais, Brazil
Galenite and quartz crystals
Chabazite crystals in quartz
Quartz encrusted calcite crystals
Orthoclase and quartz crystals
Pink tourmaline crystals growing on mica
Crystals of haematite in quartz
Amethyst
Amethyst geode
Garnet gemstone
Amethyst filled geode
Amethyst geode interior
Amethyst and chalcedony
Mineral samples
Fire opal
Opalised fossil
Ironstone matrix with potch opal
Quartz
Tourmaline cross section
Citrine
Tourmaline unworked stones
Quartz vein
Tourmaline in pegmatite host rock
Quartz types
Tourmaline gem
Tourmaline pegmatite
Rose quartz mineral, artwork
Quartz crystal from Sentis, Switzerland.
Tourmaline gem, 365 carat
Elbaite crystal, variety Tourmaline
Albite with Tourmaline
Tourmaline mineral, light micrograph
Tourmaline mica in slate
Chalcopyrite and quartz crystals
Aragonite crystals
Schorl variety of Tourmaline, Namibia
Green Tourmaline in Muscovite, Maine
Magnetite in quartz
Quartz in sphalerite
Molybdenite in quartz monzonite
Zeolite in quartz
Pyrolusite in quartz
Quartz polished stone
Tiger Eye quartz gemstone
Quartz filled concretion
Tellurium in quartz
Hessite in quartz
Emerald crystal in quartz
Quartz vein in granite
Native gold on quartz
Emerald in quartz
Labradorite rock crystals
Mica in quartz, light micrograph
Cuprocassiterite in quartz mica schist
Deformed quartz veins in slate
Schorl, the black variety of Tourmaline
Citrine crystals
Colourful crystals
Amethyst geodes
'Black' opal cabochon specimen
Opal
Amethyst crystals, light micrograph
Crystals of green toumaline and pink lepidolite
Yellow-green Tourmaline rough
Mylonite, light micrograph
Quartz and cassiterite crystals
Rough pinkish-red Rubellite
Quartz crystals, SEM
Black tourmaline, SEM
Rubellite Tourmaline in Lepidolite Mica
Herkimer diamonds of quartz mineral
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