Dravite mineral
Elbaite mineral
Elbaite mineral (tourmaline)
Indicolite tourmaline faceted stone
Watermelon tourmaline crystalline stone
Hawk's Eye quartz stone
Schorl tourmaline crystal stone
Tourmaline
Watermelon tourmaline
Tourmaline crystals in quartz
Schorl and quartz crystals in groundmass
Black tourmaline in mica schist
Tourmaline gemstone
Raw tourmaline crystal
Tourmaline gemstones and crystal
Tourmaline Pegmatite
Rubellite tourmaline pendant
Tourmaline crystal specimen
Tourmaline crystal specimens
Elbaite on albite and quartz
Tourmaline embedded in feldspar rock
Tourmaline crystals in quartzite
Verdite green tourmaline gemstone
Tourmaline in quartz
Tourmaline crystal
Tourmaline in gneiss rock
Tourmaline quartz
Opal gem necklace
Ironstone matrix with potch opal
Tourmaline specimen
Mineral samples
Fire opal
Bi-coloured tourmaline crystals
Graphic tourmaline, light micrograph
Tourmaline crystals in matrix
Opalised fossil
Andradite mineral
Tourmaline schorl specimen
Tourmaline crystals on Albite
Tourmaline crystal, thin section
Tourmaline gem, 365 carat
Tourmaline gem
Elbaite crystal, variety Tourmaline
Schorl variety of Tourmaline, Namibia
Tourmaline crystals
Albite with Tourmaline
Tourmaline gemstones in quartz
Blue tourmaline crystals
Tourmaline pegmatite
'Black' opal cabochon specimen
Granite specimen
Almandine mineral sample
Olivine mineral sample
Rough pinkish-red Rubellite
Tourmaline mineral, light micrograph
Opal mineral stone
Tourmaline mica in slate
Pink tourmaline crystals growing on mica
Quartz and green tourmaline crystals
Crystals of green toumaline and pink lepidolite
Tourmaline gemstones
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
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
Tourmaline Crystals, Minas Gerais, Brazil
Green Tourmaline in Muscovite, Maine
Schorl, the black variety of Tourmaline
Opal in its host rock
Opal gem and rock
Potch opal with smooth and rough surface
Mylonite, light micrograph
Tourmaline on quartz
Tourmaline cross section
Opal gemstones
Single piece of blue opal
Siderite mineral
Andradite crystals
Topaz crystals
Pyrope sand
Garnet gemstone
Grossular crystals in host rock
Rough emeralds
Almandine crystals in schist
Peridotite
Garnet in peridotite
Amethyst and chalcedony
Tourmaline unworked stones
Agate mineral rock cross section
Opal rock
Black opal gemstone
Tremolite crystals
Blue sapphire stone
Blue Sapphire uncut stone
Clinochlore with garnets
Amethyst
Opal on bedrock
Yellow-green Tourmaline rough
Tourmaline in pegmatite host rock
Boulder opal formation
Opal specimen and cut stone
Schorl (black Toutmaline)
Prasiolite mineral
Blue opal gemstones
Rose quartz mineral, artwork
Pallasite meteorite
Uncut diamond
Ruby crystal and gems
Emeralds
Amethyst geode
Heat-treated amethyst
Round polished Common Opal
Cut Watermelon Tourmaline gemstone
Trillion cut tourmaline gemstone
Cut green Paraiba Tourmaline gemstone
Wollastonite with kolophonite
Raw aquamarine crystal
Azurite crystals
Quartz
Quartz crystals
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
Jasp agate stone
Jasp agate polished surface
Egyptian jasper stone
Botswana agate stones
Round agate geode