Tourmaline gem
Verdite green tourmaline gemstone
Tourmaline gem, 365 carat
Tourmaline gemstone
Bi-coloured tourmaline crystals
Tourmaline Pegmatite
Tourmaline pegmatite
Tourmaline
Tourmaline crystals
Watermelon tourmaline
Tourmaline mica in slate
Black tourmaline in mica schist
Tourmaline crystals in matrix
Elbaite crystal, variety Tourmaline
Albite with Tourmaline
Tourmaline crystals on Albite
Tourmaline crystals in quartz
Indicolite tourmaline faceted stone
Watermelon tourmaline crystalline stone
Schorl tourmaline crystal stone
Green Tourmaline in Muscovite, Maine
Schorl variety of Tourmaline, Namibia
Tourmaline specimen
Tourmaline quartz
Tourmaline gemstones
Schorl and quartz crystals in groundmass
Raw tourmaline crystal
Tourmaline gemstones and crystal
Elbaite mineral (tourmaline)
Blue tourmaline crystals
Tourmaline gemstones in quartz
Pink tourmaline crystals growing on mica
Tourmaline mineral, light micrograph
Tourmaline in quartz
Tourmaline in gneiss rock
Tourmaline Crystals, Minas Gerais, Brazil
Tourmaline crystal
Quartz and green tourmaline crystals
Dravite mineral
Hawk's Eye quartz stone
Rubellite Tourmaline in Lepidolite Mica
Schorl, the black variety of Tourmaline
Crystals of green toumaline and pink lepidolite
Elbaite mineral
Tourmaline crystals in quartzite
Tourmaline crystal specimen
Tourmaline crystal specimens
Opal gemstones
Single piece of blue opal
Opal rock
Black opal gemstone
Granite specimen
Rubellite tourmaline pendant
Graphic tourmaline, light micrograph
Tourmaline crystal, thin section
Black tourmaline, SEM
Tourmaline embedded in feldspar rock
Opal gem and rock
Rubellite I
Rubellite II
Opal gem necklace
Opal mineral stone
Elbaite on albite and quartz
Granitic pegmatite
Yellow-green Tourmaline rough
Blue opal gemstones
Opal gemstone
Trillion cut tourmaline gemstone
Mylonite, light micrograph
Cut green Paraiba Tourmaline gemstone
Tourmaline schorl specimen
Ironstone matrix with potch opal
Potch opal with smooth and rough surface
Opal in its host rock
Amethyst gem
Garnet gem
Topaz gem
Polarized light experiments, 1847
Cut Watermelon Tourmaline gemstone
紅電気石
電気石
Opal
Opalised fossil
Fire opal
Opal surface
Opal on bedrock
オパール
Boulder opal formation
Opal specimen and cut stone
Luxulyanite, thin section, LM
Opal specimen
Opal specimens
Cut green Tourmaline gemstone
Fire Opal
Turquoise stones
Zircon gem
Slice through fossilised wood revealing opal
Uncut diamond from Africa
Amethyst
Sapphire, Sri Lanka, 288 carat
Citrine jewel
Peridot, Pakistan, 129 Carat
Tourmaline on quartz
Aquamarine gem, 3 carat
Round polished Common Opal
Beryl gem
Tourmaline unworked stones
Mineral samples
Amethyst crystals
Citrine crystals
ベージュの布上に置かれた花をモチーフにしたブローチ
Schorl (black Toutmaline)
'Black' opal cabochon specimen
Moonstone gemstones
Garnet.
Citrine.
Tarquoise.
Orthoclase adenoma moonstone gemstone
Asscher cut diamond gemstone
Pink diamonds
Aquamarine crystal
Topaz gemstones
Moonstone.
Tourmaline in pegmatite host rock
Tourmaline cross section
A cut and polished fire opal
Sapphire gemstone
Fire opal birthstone
Topaz crystal in albite and microcline
Emerald crystal, close up
Mass of prismatic aquamarine crystals
Diamond in rock groundmass, close-up
Garnet in Schist
Garnet crystals on schist
Topaz gemstone
Aquamarine gems
Polished turquoise stone
Turquoise gemstones
Garnet gemstones
Uncut emeralds
Rough emerald