Opal rock
Black opal gemstone
Opal mineral stone
Opal gemstones
Single piece of blue opal
Blue opal gemstones
Opal gem necklace
Opal
オパール
Opal specimen
Opal specimens
Fire opal birthstone
Opal gem and rock
Opal in its host rock
Opal gemstone
Ironstone matrix with potch opal
Potch opal with smooth and rough surface
Opal birthstone
Fire opal
Opal surface
Opal on bedrock
A cut and polished fire opal
Slice through fossilised wood revealing opal
Fire Opal
Boulder opal formation
Opal specimen and cut stone
Round polished Common Opal
Tourmaline gemstone
Three pieces of blue opal
'Black' opal cabochon specimen
蛋白石
Opalised fossil
Verdite green tourmaline gemstone
Cut Fire Opal gemstone
Mineral samples
Indicolite tourmaline faceted stone
Watermelon tourmaline crystalline stone
Hawk's Eye quartz stone
Schorl tourmaline crystal stone
Tourmaline gemstones in quartz
Bi-coloured tourmaline crystals
Tourmaline in gneiss rock
Schorl and quartz crystals in groundmass
Tourmaline Pegmatite
Tourmaline gem
Tourmaline crystals in matrix
Tourmaline
Elbaite crystal, variety Tourmaline
Schorl variety of Tourmaline, Namibia
Tourmaline crystals
Albite with Tourmaline
Tourmaline crystals on Albite
Tourmaline pegmatite
Watermelon tourmaline
Dravite mineral
Tourmaline crystals in quartz
Raw tourmaline crystal
Tourmaline gemstones and crystal
Elbaite mineral (tourmaline)
Tourmaline gem, 365 carat
Tourmaline specimen
Elbaite mineral
Blue tourmaline crystals
Tourmaline in quartz
Tourmaline quartz
Black tourmaline in mica schist
Tourmaline mica in slate
Tourmaline gemstones
Opal Bivalve fossil Coober Pedy Australia
Tourmaline Crystals, Minas Gerais, Brazil
Green Tourmaline in Muscovite, Maine
紅電気石
電気石
Limburgite
Tourmaline crystal
Pink tourmaline crystals growing on mica
Quartz and green tourmaline crystals
Crystals of green toumaline and pink lepidolite
Tourmaline mineral, light micrograph
Schorl, the black variety of Tourmaline
Sapphire gemstone
Detail of brushed copper
Topaz gemstone
Turquoise stone
Tourmaline embedded in feldspar rock
Malachite mineral stone
Aquamarine gemstone
Rubellite Tourmaline in Lepidolite Mica
Granite specimen
Tourmaline crystal specimen
Tourmaline crystal specimens
Rubellite I
Rubellite II
Granitic pegmatite
Elbaite on albite and quartz
Rubellite tourmaline pendant
Mylonite, light micrograph
Tourmaline crystal, thin section
Black tourmaline, SEM
Tourmaline crystals in quartzite
Alexandrite stone
Polarized light experiments, 1847
Yellow-green Tourmaline rough
Garnet.
Citrine.
Tarquoise.
Orthoclase adenoma moonstone gemstone
Moonstone.
Hawk's Eye
Tiger's Eye
Jade stone
Garnet crystals on schist
Pyrargyrite crystals
Moonstone gemstones
Trillion cut tourmaline gemstone
Cut green Paraiba Tourmaline gemstone
Assortment of Gemstones
Graphic tourmaline, light micrograph
Uncut diamond from Africa
Aquamarine gems
Polished turquoise stone
Topaz gemstones
Turquoise gemstones
Garnet gemstones
Turquoise stones
Uncut emeralds
Rough emerald
Amethyst crystals
Citrine crystals
Citrine
Peridot
Yellow diamond
Blue sapphire stone
Blue Sapphire uncut stone
Moonstones
ムーンストーン
Cut Watermelon Tourmaline gemstone
Luxulyanite, thin section, LM
Chrysoberyl yellow beryllium gemstone
Asscher cut diamond gemstone
Pink diamonds
Aquamarine crystal
Turquoise
Diamond
Turquoise gemstone
Uncut diamonds
Emerald gemstones