Tourmaline gemstones and crystal
Raw tourmaline crystal
Tourmaline
Tourmaline crystal
Schorl tourmaline crystal stone
Tourmaline crystals in quartz
Elbaite mineral (tourmaline)
Watermelon tourmaline
Tourmaline Pegmatite
Tourmaline quartz
Indicolite tourmaline faceted stone
Watermelon tourmaline crystalline stone
Tourmaline in gneiss rock
Tourmaline in quartz
Black tourmaline in mica schist
Verdite green tourmaline gemstone
Tourmaline crystal specimen
Tourmaline crystal specimens
Tourmaline crystal, thin section
Bi-coloured tourmaline crystals
Tourmaline gemstone
Hawk's Eye quartz stone
Elbaite mineral
Dravite mineral
Schorl and quartz crystals in groundmass
Rubellite tourmaline pendant
Tourmaline crystals in quartzite
Tourmaline gemstones
Tourmaline embedded in feldspar rock
Tourmaline gemstones in quartz
Elbaite on albite and quartz
Elbaite crystal, variety Tourmaline
Graphic tourmaline, light micrograph
Tourmaline specimen
Tourmaline pegmatite
Tourmaline gem
Tourmaline crystals
Tourmaline mica in slate
Blue tourmaline crystals
Tourmaline gem, 365 carat
Tourmaline crystals in matrix
Albite with Tourmaline
Tourmaline crystals on Albite
Quartz and green tourmaline crystals
Schorl variety of Tourmaline, Namibia
Pink tourmaline crystals growing on mica
Tourmaline schorl specimen
Tourmaline mineral, light micrograph
Tourmaline Crystals, Minas Gerais, Brazil
Green Tourmaline in Muscovite, Maine
Schorl, the black variety of Tourmaline
Opal gem necklace
Fire opal
Ironstone matrix with potch opal
Opal gemstones
Crystals of green toumaline and pink lepidolite
Blue opal gemstones
Black tourmaline, SEM
Rubellite Tourmaline in Lepidolite Mica
Tourmaline on quartz
Opalised fossil
Tourmaline cross section
Mineral samples
Tourmaline unworked stones
Raw amethyst crystal
Raw citrine crystal
Tourmaline in pegmatite host rock
Schorl (black Toutmaline)
Single piece of blue opal
Opal mineral stone
Opal rock
Black opal gemstone
'Black' opal cabochon specimen
Opal
Cut Watermelon Tourmaline gemstone
Grossular dodecahedral crystal
Yellow-green Tourmaline rough
Granite specimen
Mylonite, light micrograph
Raw garnet crystal
Rough pinkish-red Rubellite
Quartz crystal from Sentis, Switzerland.
Deformation of garnet crystal
Emerald crystal, close up
Prismatic amethyst crystal
Olivine peridot crystal, close up
Topaz crystal in albite and microcline
Polarized light experiments, 1847
Granitic pegmatite
Trillion cut tourmaline gemstone
Uncut diamonds
Cut green Paraiba Tourmaline gemstone
Opal gemstone
Raw aquamarine crystal
Amethyst gemstones and crystal
Rubellite I
Rubellite II
Quartz crystals
Ruby crystal and gems
Quartz vein
Malachite
Opal specimen
Single amethyst crystal, close up
Diamond gemstones
Andradite crystals
Citrine
Almandine mineral sample
Olivine mineral sample
Nephrite crystals
Topaz crystals
Pyrope sand
Jade stone
Garnet gemstone
Amethyst filled geode
Garnet crystals on schist
Topaz specimens
Grossular crystals in host rock
Rough emeralds
Almandine crystals in schist
Pyrargyrite crystals
Amethyst geode interior
Spessartine garnet
Andradite mineral
Demantoid
Amethyst crystals, light micrograph
Peridotite
Garnet in peridotite
Sample of sapphire
Amethyst crystals
Diamond
Aquamarine crystals
Diamonds
Amethyst and chalcedony
Lazurite crystals in a matrix of calcite
Citrine crystals
Mass of prismatic aquamarine crystals
Grossular garnet crystals on rock surface
Andradite, New Jersey
Calcite on amethyst
Sapphire crystal
Cordierite crystal
Opal in its host rock
Opal gem and rock
Opal surface
Opal on bedrock