Tourmaline gem, 365 carat
Tourmaline gem
Verdite green tourmaline gemstone
Bi-coloured tourmaline crystals
Tourmaline gemstone
Tourmaline Pegmatite
Tourmaline pegmatite
Tourmaline
Tourmaline crystals
Tourmaline specimen
Watermelon tourmaline
Tourmaline mica in slate
Black tourmaline in mica schist
Raw tourmaline crystal
Tourmaline gemstones and crystal
Elbaite mineral (tourmaline)
Tourmaline crystals in matrix
Elbaite crystal, variety Tourmaline
Albite with Tourmaline
Tourmaline crystals on Albite
Tourmaline gemstones in quartz
Indicolite tourmaline faceted stone
Watermelon tourmaline crystalline stone
Schorl tourmaline crystal stone
Tourmaline crystals in quartz
Blue tourmaline crystals
Pink tourmaline crystals growing on mica
Green Tourmaline in Muscovite, Maine
Schorl variety of Tourmaline, Namibia
Tourmaline quartz
Tourmaline crystal
Tourmaline gemstones
Schorl and quartz crystals in groundmass
Tourmaline mineral, light micrograph
Tourmaline in quartz
Tourmaline in gneiss rock
Quartz and green tourmaline crystals
Tourmaline Crystals, Minas Gerais, Brazil
Crystals of green toumaline and pink lepidolite
Hawk's Eye quartz stone
Elbaite mineral
Dravite mineral
Rubellite Tourmaline in Lepidolite Mica
Schorl, the black variety of Tourmaline
Tourmaline crystals in quartzite
Rubellite tourmaline pendant
Tourmaline crystal specimen
Tourmaline crystal specimens
Tourmaline embedded in feldspar rock
Opal gemstones
Single piece of blue opal
Opal mineral stone
Opal rock
Black opal gemstone
Elbaite on albite and quartz
Granite specimen
Graphic tourmaline, light micrograph
Tourmaline crystal, thin section
Black tourmaline, SEM
Blue opal gemstones
Opal gem necklace
Opal gem and rock
Granitic pegmatite
Rubellite I
Rubellite II
Yellow-green Tourmaline rough
Peridot, Pakistan, 129 Carat
Opal gemstone
Aquamarine gem, 3 carat
Sapphire, Sri Lanka, 288 carat
Polarized light experiments, 1847
Cut Watermelon Tourmaline gemstone
Trillion cut tourmaline gemstone
Mylonite, light micrograph
Cut green Paraiba Tourmaline gemstone
Ironstone matrix with potch opal
Potch opal with smooth and rough surface
Opal
Opal in its host rock
Amethyst gem
Garnet gem
Topaz gem
Tourmaline schorl specimen
Boulder opal formation
Opal specimen and cut stone
Opal specimen
Opalised fossil
Fire opal
Opal surface
Opal on bedrock
電気石
紅電気石
オパール
Luxulyanite, thin section, LM
Scapolite, 1292 carat
Opal specimens
Round polished Common Opal
Fire Opal
Cut green Tourmaline gemstone
Turquoise stones
Zircon gem
Amethyst crystals
Mineral samples
Amethyst
Citrine jewel
Uncut diamond from Africa
Beryl gem
Slice through fossilised wood revealing opal
Schorl (black Toutmaline)
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
Tourmaline on quartz
Citrine crystals
Tourmaline cross section
Aquamarine gems
Garnet.
Citrine.
Tarquoise.
Moonstone.
Orthoclase adenoma moonstone gemstone
Topaz gemstone
Fire opal birthstone
Moonstone gemstones
Asscher cut diamond gemstone
Pink diamonds
Aquamarine crystal
Topaz gemstones
'Black' opal cabochon specimen
Tourmaline unworked stones
Malachite mineral stone
Sapphire gemstone
Aquamarine gemstone
Topaz crystal in albite and microcline
Emerald crystal, close up
Mass of prismatic aquamarine crystals
Olivine peridot crystal, close up
Diamond in rock groundmass, close-up
Garnet in Schist
Garnet crystals on schist
Garnet
Tourmaline in pegmatite host rock
Yellow diamond
Rough pinkish-red Rubellite
A cut and polished fire opal
Three pieces of blue opal
Rough emerald
Turquoise