Opal specimens
Opal specimen
Opal gemstones
Opal rock
Opal mineral stone
Black opal gemstone
Single piece of blue opal
Blue opal gemstones
オパール
Opal
Opal gemstone
Opal gem necklace
Boulder opal formation
Opal gem and rock
'Black' opal cabochon specimen
Opal in its host rock
Opal specimen and cut stone
Ironstone matrix with potch opal
Potch opal with smooth and rough surface
Fire opal birthstone
Fire opal
Opal surface
Fire Opal
Opal on bedrock
Round polished Common Opal
Cut Fire Opal gemstone
Mineral samples
Opal birthstone
Three pieces of blue opal
A cut and polished fire opal
Slice through fossilised wood revealing opal
Opalised fossil
Verdite green tourmaline gemstone
Tourmaline
Opal Bivalve fossil Coober Pedy Australia
Tourmaline gemstone
Topaz specimens
蛋白石
Bi-coloured tourmaline crystals
Limburgite
Turquoise specimen and polished stone
Detail of brushed copper
Tourmaline crystal specimens
Tourmaline crystals in quartz
Indicolite tourmaline faceted stone
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
Rubellite Tourmaline in Lepidolite Mica
Green Tourmaline in Muscovite, Maine
Albite with Tourmaline
Tourmaline crystals on Albite
Tourmaline gemstones in quartz
Watermelon tourmaline crystalline stone
Hawk's Eye quartz stone
Schorl tourmaline crystal stone
Granite specimen
Rubellite tourmaline pendant
Tourmaline crystal specimen
Tourmaline specimen
Watermelon tourmaline
Elbaite mineral
Dravite mineral
Blue tourmaline crystals
Tourmaline pegmatite
Elbaite on albite and quartz
Schorl and quartz crystals in groundmass
Tourmaline Pegmatite
Tourmaline embedded in feldspar rock
Elbaite mineral (tourmaline)
Ruby
Tourmaline crystal, thin section
Black tourmaline, SEM
Tourmaline in quartz
Black tourmaline in mica schist
Tourmaline mineral, light micrograph
Tourmaline crystals in quartzite
Tourmaline mica in slate
Tourmaline crystal
Tourmaline in gneiss rock
Pink tourmaline crystals growing on mica
Quartz and green tourmaline crystals
Crystals of green toumaline and pink lepidolite
Tourmaline gemstones
Tourmaline quartz
Mylonite, light micrograph
Cut Watermelon Tourmaline gemstone
Yellow-green Tourmaline rough
Trillion cut tourmaline gemstone
Cut green Paraiba Tourmaline gemstone
Rough emerald
Turquoise mineral
Graphic tourmaline, light micrograph
Diamond specimen
Tourmaline schorl specimen
Aquamarine gems
Sapphire gemstone
Citrine.
Amethyst
Citrine
Polarized light experiments, 1847
Granitic pegmatite
Rubellite I
Rubellite II
Cut green Tourmaline gemstone
電気石
紅電気石
Diamonds
Turquoise stones
Rough pinkish-red Rubellite
Garnet.
Tarquoise.
Moonstone.
Amethyst crystals
Malachite mineral stone
Orthoclase adenoma moonstone gemstone
Topaz gemstone
Aquamarine gemstone
Yellow diamond
Rubies and sapphire
Tiger eye
石板にシルクを三角に折りアクセサリーを配置
Moonstone gemstones
Uncut diamond from Africa
Tourmaline cross section
Diamond
Polished turquoise stone
Topaz gemstones
Emerald gemstones
Turquoise gemstones
Turquoise gemstone
Precious gemstones
Garnet gemstones
Uncut diamonds
Turquoise
Uncut emeralds
Citrine crystals
Tourmaline on quartz