Tourmaline crystals in quartz
Tourmaline
Schorl and quartz crystals in groundmass
Watermelon tourmaline
Tourmaline gemstone
Elbaite mineral (tourmaline)
Indicolite tourmaline faceted stone
Watermelon tourmaline crystalline stone
Schorl tourmaline crystal stone
Black tourmaline in mica schist
Hawk's Eye quartz stone
Tourmaline quartz
Tourmaline in quartz
Elbaite mineral
Dravite mineral
Tourmaline crystals in quartzite
Tourmaline Pegmatite
Tourmaline crystal
Raw tourmaline crystal
Tourmaline gemstones and crystal
Tourmaline in gneiss rock
Bi-coloured tourmaline crystals
Rubellite tourmaline pendant
Tourmaline crystal specimen
Tourmaline crystal specimens
Tourmaline embedded in feldspar rock
Verdite green tourmaline gemstone
Elbaite on albite and quartz
Tourmaline specimen
Graphic tourmaline, light micrograph
Tourmaline on quartz
Quartz and green tourmaline crystals
Tourmaline crystals
Tourmaline gemstones in quartz
Tourmaline gemstones
Ironstone matrix with potch opal
Fire opal
Opal gem necklace
Tourmaline crystals in matrix
Tourmaline crystals on Albite
Blue tourmaline crystals
Tourmaline crystal, thin section
Tourmaline schorl specimen
Tourmaline cross section
Pink tourmaline crystals growing on mica
Mineral samples
Opalised fossil
Tourmaline gem
Tourmaline pegmatite
Tourmaline gem, 365 carat
Elbaite crystal, variety Tourmaline
Albite with Tourmaline
Tourmaline mica in slate
Tourmaline Crystals, Minas Gerais, Brazil
Schorl variety of Tourmaline, Namibia
Yellow-green Tourmaline rough
Rough pinkish-red Rubellite
Crystals of green toumaline and pink lepidolite
Quartz crystals
Tourmaline unworked stones
Tourmaline mineral, light micrograph
Green Tourmaline in Muscovite, Maine
Tourmaline in pegmatite host rock
Cut Watermelon Tourmaline gemstone
Trillion cut tourmaline gemstone
Cut green Paraiba Tourmaline gemstone
Schorl (black Toutmaline)
Andradite crystals
Nephrite crystals
Topaz crystals
Pyrargyrite crystals
Almandine crystals in schist
Garnet crystals on schist
Grossular crystals in host rock
Opal
'Black' opal cabochon specimen
Grossular garnet crystals on rock surface
Mylonite, light micrograph
Granite specimen
Opal gemstones
Schorl, the black variety of Tourmaline
Smoky quartz crystals
Galenite and quartz crystals
Quartz and cassiterite crystals
Chabazite crystals in quartz
Quartz encrusted calcite crystals
Orthoclase and quartz crystals
Tremolite crystals
Quartz
Topaz crystal in albite and microcline
Emerald crystal, close up
Prismatic amethyst crystal
Olivine peridot crystal, close up
Pallasite meteorite
Emeralds
Almandine mineral sample
Olivine mineral sample
Pyrope sand
Garnet gemstone
Amethyst filled geode
Topaz specimens
Rough emeralds
First laser
Amethyst geode interior
Spessartine garnet
Grossular dodecahedral crystal
Andradite mineral
Demantoid
Uncut diamonds
Peridotite
Garnet in peridotite
Amethyst and chalcedony
Citrine
Jade stone
Potch opal with smooth and rough surface
Round polished Common Opal
Opal in its host rock
Opal gem and rock
Opal on bedrock
Granitic pegmatite
Polarized light experiments, 1847
Black tourmaline, SEM
Single piece of blue opal
Blue opal gemstones
Rubellite Tourmaline in Lepidolite Mica
Rubellite I
Rubellite II
Cut green Tourmaline gemstone
Amethyst crystals
Magnetite in quartz
Quartz in sphalerite
Molybdenite in quartz monzonite
Rose quartz mineral, artwork
Zeolite in quartz
Pyrolusite in quartz
Tellurium in quartz
Hessite in quartz
Emerald crystal in quartz