Tourmaline in quartz
Tourmaline quartz
Elbaite on albite and quartz
Elbaite mineral (tourmaline)
Indicolite tourmaline faceted stone
Tourmaline crystals in quartz
Tourmaline in pegmatite host rock
Elbaite mineral
Schorl and quartz crystals in groundmass
Schorl tourmaline crystal stone
Hawk's Eye quartz stone
Tourmaline
Elbaite crystal, variety Tourmaline
Tourmaline gemstones in quartz
Tourmaline Pegmatite
Watermelon tourmaline
Tourmaline crystal
Raw tourmaline crystal
Tourmaline gemstones and crystal
Watermelon tourmaline crystalline stone
Tourmaline in gneiss rock
Black tourmaline in mica schist
Verdite green tourmaline gemstone
Tourmaline gemstone
Bi-coloured tourmaline crystals
Quartz and green tourmaline crystals
Dravite mineral
Tourmaline crystal, thin section
Rubellite tourmaline pendant
Tourmaline crystals in quartzite
Tourmaline crystal specimen
Tourmaline crystal specimens
Tourmaline embedded in feldspar rock
Opal gem necklace
Graphic tourmaline, light micrograph
Tourmaline gem
Tourmaline crystals
Tourmaline pegmatite
Tourmaline specimen
Tourmaline gemstones
Rubellite I
Rubellite II
Tourmaline gem, 365 carat
Tourmaline crystals in matrix
Albite with Tourmaline
Tourmaline crystals on Albite
Tourmaline mica in slate
Blue tourmaline crystals
Schorl variety of Tourmaline, Namibia
Pink tourmaline crystals growing on mica
Schorl (black Toutmaline)
Tourmaline schorl specimen
Tourmaline on quartz
Tourmaline mineral, light micrograph
Quartz crystals
Tourmaline Crystals, Minas Gerais, Brazil
Green Tourmaline in Muscovite, Maine
Herkimer diamonds of quartz mineral
Schorl, the black variety of Tourmaline
Ironstone matrix with potch opal
Fire opal
Citrine crystals
Crystals of green toumaline and pink lepidolite
Quartz vein
Raw amethyst crystal
Raw citrine crystal
Prismatic amethyst crystal
Calcite on amethyst
Jade stone
Garnet gemstone
Amethyst filled geode
Amethyst geode interior
Amethyst crystals, light micrograph
Amethyst crystals
Amethyst and chalcedony
Quartz crystal from Sentis, Switzerland.
Opal gemstone
Smoky quartz
Quartz crystal
Quartz mineral
Black tourmaline, SEM
Granite specimen
Rubellite Tourmaline in Lepidolite Mica
Opalised fossil
Tourmaline cross section
Smoky quartz crystals
Rose quartz mineral, artwork
Tourmaline unworked stones
Amethyst
Fluorite crystals on quartz, close up
Blue sapphire stone
Blue Sapphire uncut stone
Amethyst geode
Citrine
Opal gemstones
Single piece of blue opal
Blue opal gemstones
Mineral samples
Opal
'Black' opal cabochon specimen
Fire Opal
Quartz
Opal mineral stone
Opal rock
Black opal gemstone
Geode interior
Yellow-green Tourmaline rough
Mylonite, light micrograph
Rough pinkish-red Rubellite
Agate geode
Pyromorphite specimen
Siderite specimen
Quartzite metamorphic rock
Dendritic crystals in chalcedony
Iron oxide precipitation in agate
Agate mineral rock cross section
Jasp agate stone
Jasp agate polished surface
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
Amethyst stone