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