Tourmaline in pegmatite host rock
Tourmaline Pegmatite
Tourmaline quartz
Tourmaline in quartz
Schorl tourmaline crystal stone
Schorl and quartz crystals in groundmass
Indicolite tourmaline faceted stone
Elbaite mineral (tourmaline)
Black tourmaline in mica schist
Rubellite I
Rubellite II
Tourmaline pegmatite
Rubellite
Elbaite on albite and quartz
Tourmaline schorl specimen
Elbaite mineral
Tourmaline in gneiss rock
Tourmaline
Tourmaline crystals in quartz
Tourmaline on quartz
Rubellite crystals
Schorl (black Toutmaline)
Watermelon tourmaline
Watermelon tourmaline crystalline stone
Hawk's Eye quartz stone
Quartz and green tourmaline crystals
Graphic tourmaline, light micrograph
Tourmaline gemstone
Rubellite tourmaline pendant
Tourmaline crystals in quartzite
Tourmaline crystal specimen
Tourmaline crystal specimens
Elbaite crystal, variety Tourmaline
Dravite mineral
Tourmaline embedded in feldspar rock
Schorl variety of Tourmaline, Namibia
Tourmaline crystal
Raw tourmaline crystal
Tourmaline gemstones and crystal
Emeralds
Tourmaline unworked stones
Pink tourmaline crystals growing on mica
Luxulyanite, thin section, LM
Amethyst
Limburgite
Opal gem necklace
Brazilianite crystals in calcite
Tourmaline crystal, thin section
Tourmaline specimen
Verdite green tourmaline gemstone
Granite specimen
Bi-coloured tourmaline crystals
Tourmaline gemstones in quartz
Crystals of green toumaline and pink lepidolite
Tourmaline cross section
Rubellite Tourmaline in Lepidolite Mica
Green Tourmaline in Muscovite, Maine
Cut Indicolite gemstone
Fuchsite mineral stone
Rough pinkish-red Rubellite
Herkimer diamonds of quartz mineral
Granite
Fire opal
Ironstone matrix with potch opal
Molybdenite in pegmatite
Graphic granite rock
Arsenopyrite
Emerald in host rock
Tourmaline gem
Tourmaline crystals
Tourmaline gemstones
Basaltic dyke rock
Mica schist folds, polarised light LM
Tourmaline gem, 365 carat
Tourmaline crystals in matrix
Albite with Tourmaline
Tourmaline crystals on Albite
Tourmaline mica in slate
Blue tourmaline crystals
Aquamarine and muscovite
Aquamarine on muscovite
Aquamarine in muscovite matrix, close
Mineral samples
Granitic pegmatite
Galenite cubes
Iron oxide precipitation in agate
Smoky quartz crystals
Rose quartz mineral, artwork
Jade stone
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
Banded Amethyst stone
Beryl stone
Calcite crystal
Calcite
Chalcopyrite
Chiastolite stone
Garnet gemstone
Jasper polished stone
Amethyst filled geode
Cut and polished agate
Agate geode
Amethyst geode interior
Amethyst and chalcedony
Prismatic amethyst crystal
'Black' opal cabochon specimen
Opalised fossil
Opal
Rhyolitic geode
Titanite bearing granite
Peridotite
Garnet in peridotite
Quartz vein in granite
Quartz
Native gold
Quartz crystals
Magnetite in quartz
Cuprocassiterite in quartz mica schist
Citrine
Siderite mineral
Pseudomorphic crystal growth
Quartz in sphalerite
Molybdenite in quartz monzonite
Galenite and quartz crystals
Colourful crystals
Prasiolite mineral
Zeolite in quartz
Pyrolusite in quartz
Quartz polished stone
Tiger Eye quartz gemstone