Tourmaline
Elbaite mineral (tourmaline)
Watermelon tourmaline
Tourmaline crystals in quartz
Indicolite tourmaline faceted stone
Watermelon tourmaline crystalline stone
Schorl tourmaline crystal stone
Black tourmaline in mica schist
Rubellite tourmaline pendant
Tourmaline crystal specimen
Tourmaline crystal specimens
Tourmaline embedded in feldspar rock
Tourmaline gemstone
Hawk's Eye quartz stone
Elbaite mineral
Dravite mineral
Schorl and quartz crystals in groundmass
Raw tourmaline crystal
Tourmaline gemstones and crystal
Tourmaline crystals in quartzite
Tourmaline Pegmatite
Elbaite on albite and quartz
Graphic tourmaline, light micrograph
Tourmaline crystal
Tourmaline quartz
Tourmaline in quartz
Tourmaline in gneiss rock
Verdite green tourmaline gemstone
Tourmaline schorl specimen
Tourmaline specimen
Tourmaline crystal, thin section
Bi-coloured tourmaline crystals
Opal gem necklace
Ironstone matrix with potch opal
Mineral samples
Amethyst
Citrine
Fire opal
Opalised fossil
Tourmaline on quartz
Azurite crystals
Tourmaline cross section
'Black' opal cabochon specimen
Tourmaline gem
Tourmaline crystals
Tourmaline pegmatite
Ruby
Tourmaline unworked stones
Tourmaline gem, 365 carat
Tourmaline crystals in matrix
Elbaite crystal, variety Tourmaline
Albite with Tourmaline
Tourmaline crystals on Albite
Tourmaline gemstones in quartz
Blue tourmaline crystals
Yellow-green Tourmaline rough
Granite specimen
Tourmaline Crystals, Minas Gerais, Brazil
Schorl variety of Tourmaline, Namibia
Green Tourmaline in Muscovite, Maine
Schorl, the black variety of Tourmaline
Quartz
Rough pinkish-red Rubellite
Opal
Tourmaline gemstones
Opal specimen
Tourmaline mineral, light micrograph
Tourmaline mica in slate
Cut Watermelon Tourmaline gemstone
Trillion cut tourmaline gemstone
Mylonite, light micrograph
Quartz and green tourmaline crystals
Cut green Paraiba Tourmaline gemstone
Pink tourmaline crystals growing on mica
Rubellite Tourmaline in Lepidolite Mica
Blue lace agate
Tourmaline in pegmatite host rock
Opal specimens
Grossular dodecahedral crystal
Black tourmaline, SEM
Nephrite crystals
Tremolite crystals
Blue sapphire stone
Blue Sapphire uncut stone
Jade stone
Amethyst geode
Amethyst filled geode
Clinochlore with garnets
Garnet crystals on schist
Pyrargyrite crystals
Topaz specimens
Amethyst geode interior
Spessartine garnet
Andradite mineral
Demantoid
Uncut diamonds
Topaz crystal in albite and microcline
Emerald crystal, close up
Prismatic amethyst crystal
Olivine peridot crystal, close up
Heat-treated amethyst
Grossular garnet crystals on rock surface
Crystals of green toumaline and pink lepidolite
Amethyst crystals
Opal in its host rock
Boulder opal formation
Opal gem and rock
Opal specimen and cut stone
Potch opal with smooth and rough surface
Cut green Tourmaline gemstone
Tiger eye
Uncut diamond
Andradite crystals
Almandine mineral sample
Olivine mineral sample
Garnets in micaschist, light micrograph
Topaz crystals
Pyrope sand
Garnet gemstone
Ruby crystal and gems
Grossular crystals in host rock
Rough emeralds
Almandine crystals in schist
Crushed diamond, SEM
Emeralds
Peridotite
Garnet in peridotite
Amethyst and chalcedony
Lapis lazuli crystals
Opal gemstones
Single piece of blue opal
Opal mineral stone
Opal rock
Black opal gemstone
Sapphire crystal
Amethyst geodes
Uvarovite garnet crystals
Orange sapphire gemstone
Topaz gemstone
Opal on bedrock
Round polished Common Opal
Fluorite