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