Fire Opal
Fire opal
Cut Fire Opal gemstone
A cut and polished fire opal
Opal gemstones
Opal rock
Opal gem necklace
Opal gemstone
Blue opal gemstones
Opal mineral stone
Black opal gemstone
Single piece of blue opal
Opal specimen
Opal Bivalve fossil Coober Pedy Australia
Opal specimens
Ironstone matrix with potch opal
Opal
Tourmaline crystal, thin section
Black tourmaline, SEM
Opal surface
Boulder opal formation
Opal gem and rock
Opal on bedrock
Opal in its host rock
Opal specimen and cut stone
Citrine
Potch opal with smooth and rough surface
Yellow crystal
Concentric banding in agate
Yellow-green Tourmaline rough
'Black' opal cabochon specimen
Fire opal birthstone
Round polished Common Opal
Opalised fossil
Smoky quartz
Cut Watermelon Tourmaline gemstone
Trillion cut tourmaline gemstone
Cut green Paraiba Tourmaline gemstone
Carnelian
Raw garnet crystal
Gneiss with garnet
Uncut emeralds
Tourmaline crystals in quartz
Mineral samples
オパール
Tourmaline in quartz
Tourmaline gemstones in quartz
Tourmaline quartz
Schorl and quartz crystals in groundmass
Emerald
Gneiss with garnet, light micrograph
Aventurine
Tourmaline
Tourmaline on quartz
Rough pinkish-red Rubellite
Lapis lazuli, SEM
Tourmaline cross section
Cut green Tourmaline gemstone
Bi-coloured tourmaline crystals
Three pieces of blue opal
Elbaite on albite and quartz
Verdite green tourmaline gemstone
Slice through fossilised wood revealing opal
Dendrites in agate
Tourmaline unworked stones
Quartz coated with silica
Opal birthstone
Amethyst crystals
Hawk's Eye quartz stone
Schorl tourmaline crystal stone
Quartz and green tourmaline crystals
Almandine
Cut Pyrope gemstone
Rare bright green Uvarovite Garnet
Cut Quartz gemstone
Cut Indicolite gemstone
Twinned augite crystals
Tourmaline gemstone
Brecciated jasper
Granite specimen
Amethyst gemstones
Agate
Chalcedony
Citrine crystals
Raw tourmaline crystal
Tourmaline gemstones and crystal
Tourmaline gem, 365 carat
Tourmaline gem
Tourmaline crystals in matrix
Schorl, the black variety of Tourmaline
Tourmaline Crystals, Minas Gerais, Brazil
Elbaite crystal, variety Tourmaline
Schorl variety of Tourmaline, Namibia
Tourmaline crystals
Green Tourmaline in Muscovite, Maine
Albite with Tourmaline
Tourmaline crystals on Albite
Black tourmaline in mica schist
Tourmaline mineral, light micrograph
Indicolite tourmaline faceted stone
Watermelon tourmaline crystalline stone
Tourmaline specimen
Watermelon tourmaline
Elbaite mineral
Dravite mineral
Tourmaline mica in slate
Tourmaline crystal
Tourmaline in gneiss rock
Blue tourmaline crystals
Pink tourmaline crystals growing on mica
Crystals of green toumaline and pink lepidolite
Tourmaline gemstones
Tourmaline pegmatite
Tourmaline Pegmatite
Elbaite mineral (tourmaline)
Tiger eye, polished surface
Tiger eye, light micrograph
Garnet
Quartz crystals, SEM
Quartz crystal, SEM
Moss agate
Moonstone.
Limburgite
Amethyst
Cut Kyanite gemstone
Prehnite and okenite
Lapis lazuli crystals I
Lapis lazuli crystals II
Raw amethyst crystal
Raw citrine crystal
Amethyst gem
Bloodstone
Bloodstone specimen
Quartz variety Citrine
Agate, polarised light micrograph
Amber citrine quartz stone
Agate in amethyst
Blue sapphire stone
Blue Sapphire uncut stone
Jade stone