Tourmaline crystals in matrix
Verdite green tourmaline gemstone
Bi-coloured tourmaline crystals
Tourmaline
Tourmaline gemstone
Tourmaline crystals
Elbaite crystal, variety Tourmaline
Tourmaline crystals on Albite
Tourmaline crystals in quartz
Blue tourmaline crystals
Schorl variety of Tourmaline, Namibia
Green Tourmaline in Muscovite, Maine
Tourmaline Crystals, Minas Gerais, Brazil
Tourmaline gem
Tourmaline specimen
Watermelon tourmaline
Tourmaline pegmatite
Tourmaline Pegmatite
Quartz and green tourmaline crystals
Raw tourmaline crystal
Tourmaline gemstones and crystal
Tourmaline gem, 365 carat
Albite with Tourmaline
Tourmaline gemstones in quartz
Indicolite tourmaline faceted stone
Watermelon tourmaline crystalline stone
Schorl tourmaline crystal stone
Elbaite mineral (tourmaline)
Pink tourmaline crystals growing on mica
Tourmaline crystal
Tourmaline gemstones
Tourmaline quartz
Schorl and quartz crystals in groundmass
Dravite mineral
Tourmaline in quartz
Tourmaline mica in slate
Tourmaline in gneiss rock
Black tourmaline in mica schist
Crystals of green toumaline and pink lepidolite
Hawk's Eye quartz stone
Elbaite mineral
Tourmaline mineral, light micrograph
Tourmaline embedded in feldspar rock
Schorl, the black variety of Tourmaline
Tourmaline crystals in quartzite
Rubellite tourmaline pendant
Tourmaline crystal specimen
Tourmaline crystal specimens
Rubellite Tourmaline in Lepidolite Mica
Opal gemstones
Single piece of blue opal
Opal mineral stone
Opal rock
Black opal gemstone
Tourmaline crystal, thin section
Black tourmaline, SEM
Blue opal gemstones
Ironstone matrix with potch opal
Yellow-green Tourmaline rough
Granite specimen
Elbaite on albite and quartz
Graphic tourmaline, light micrograph
Opal gemstone
Polarized light experiments, 1847
Granitic pegmatite
Cut Watermelon Tourmaline gemstone
Trillion cut tourmaline gemstone
Mylonite, light micrograph
Cut green Paraiba Tourmaline gemstone
Opal
Opal gem necklace
Opal in its host rock
Opal gem and rock
Potch opal with smooth and rough surface
Rubellite I
Rubellite II
Tourmaline schorl specimen
Opal specimen
Fire opal
Opal surface
Opal on bedrock
電気石
紅電気石
Boulder opal formation
Opal specimen and cut stone
Citrine crystals, Rio Grande, Brazil
オパール
Spessartite crystals, Monroe, Connecticut
Grossularite Garnet crystals, Hessonite
Opal specimens
Garnet.
Round polished Common Opal
Opalised fossil
Fire Opal
Cut green Tourmaline gemstone
Topaz or Beryl crystals
Mineral samples
Uncut diamond from Africa
Amethyst crystals
Citrine crystals
Lazurite
Garnet in Schist
Andradite, New Jersey
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)
Luxulyanite, thin section, LM
Lazurite crystals in a matrix of calcite
Tourmaline on quartz
Aquamarine gems
Citrine.
Tarquoise.
Moonstone.
Orthoclase adenoma moonstone gemstone
Topaz gemstone
Moonstone gemstones
Tourmaline cross section
Fire opal birthstone
Turquoise stones
Aquamarine crystal
Topaz gemstones
Asscher cut diamond gemstone
Pink diamonds
'Black' opal cabochon specimen
Nephrite crystals
Pyrargyrite crystals
Tourmaline unworked stones
Garnet, Concord, Vermont, USA
Garnet, variety Uvarovite on diopside
Almandine
Malachite mineral stone
Sapphire gemstone
Aquamarine gemstone
Garnet crystals on schist
Mass of prismatic aquamarine crystals
Yellow diamond
Spessartite (garnet) crystals growing on albite
Grossular garnet crystals on rock surface
Tourmaline in pegmatite host rock
Diamond
Polished turquoise stone
Emerald gemstones
Turquoise gemstones