Elbaite crystal, variety Tourmaline
Elbaite mineral (tourmaline)
Indicolite tourmaline faceted stone
Tourmaline quartz
Tourmaline in quartz
Verdite green tourmaline gemstone
Elbaite mineral
Tourmaline gemstone
Bi-coloured tourmaline crystals
Schorl variety of Tourmaline, Namibia
Tourmaline
Albite with Tourmaline
Tourmaline crystals on Albite
Tourmaline crystals
Raw tourmaline crystal
Tourmaline gemstones and crystal
Schorl tourmaline crystal stone
Elbaite on albite and quartz
Tourmaline crystals in matrix
Tourmaline crystal
Tourmaline gem
Tourmaline specimen
Watermelon tourmaline
Tourmaline pegmatite
Tourmaline Pegmatite
Tourmaline gem, 365 carat
Tourmaline gemstones in quartz
Watermelon tourmaline crystalline stone
Tourmaline crystals in quartz
Blue tourmaline crystals
Tourmaline Crystals, Minas Gerais, Brazil
Green Tourmaline in Muscovite, Maine
Schorl, the black variety of Tourmaline
Tourmaline embedded in feldspar rock
Tourmaline gemstones
Rubellite I
Rubellite II
Tourmaline mica in slate
Tourmaline in gneiss rock
Black tourmaline in mica schist
Quartz and green tourmaline crystals
Tourmaline crystal specimen
Tourmaline crystal specimens
Pink tourmaline crystals growing on mica
Hawk's Eye quartz stone
Dravite mineral
Schorl and quartz crystals in groundmass
Tourmaline crystal, thin section
Tourmaline mineral, light micrograph
Rubellite tourmaline pendant
Rubellite Tourmaline in Lepidolite Mica
Crystals of green toumaline and pink lepidolite
Yellow-green Tourmaline rough
Black tourmaline, SEM
Tourmaline crystals in quartzite
Tourmaline in pegmatite host rock
Cut Watermelon Tourmaline gemstone
Trillion cut tourmaline gemstone
Cut Indicolite gemstone
Granite specimen
Cut green Paraiba Tourmaline gemstone
Graphic tourmaline, light micrograph
Mylonite, light micrograph
Opal gemstones
Single piece of blue opal
Tourmaline schorl specimen
Opal mineral stone
Opal rock
Black opal gemstone
Polarized light experiments, 1847
Granitic pegmatite
Blue opal gemstones
Cut green Tourmaline gemstone
Opal gemstone
Tourmaline unworked stones
電気石
紅電気石
Opal specimen
Opal
Opal gem necklace
Opal in its host rock
Opal gem and rock
Ironstone matrix with potch opal
Potch opal with smooth and rough surface
Tourmaline on quartz
Tourmaline cross section
Opal specimens
Fire opal
Opal surface
Opal on bedrock
Round polished Common Opal
Boulder opal formation
Opal specimen and cut stone
Rough pinkish-red Rubellite
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
オパール
Mineral properties, 18th century
Garnet, variety Uvarovite on diopside
Opalised fossil
Fire Opal
Aquamarine crystal
Garnet.
'Black' opal cabochon specimen
Mineral samples
Topaz or Beryl crystals
Tarquoise.
Uncut diamond from Africa
Emerald crystal, close up
Olivine peridot crystal, close up
石板にシルクを三角に折りアクセサリーを配置
Rubellite
Emerald gemstones
Turquoise stones
Rough emerald
Uncut emeralds
Aquamarine gems
Citrine.
Moonstone.
Orthoclase adenoma moonstone gemstone
Topaz gemstone
Fire opal birthstone
Quartz variety Citrine
Topaz gemstones
Asscher cut diamond gemstone
Pink diamonds
Peridot gemstones
Moonstone gemstones
Grossularite Garnet crystals, Hessonite
Amethyst crystals
Herkimer Diamond
Lapis lazuli specimen
Aquamarine crystal, variety Beryl
Malachite mineral stone
Sapphire gemstone
Aquamarine gemstone
Raw amethyst crystal
Raw citrine crystal
Grossularite Garnet crystal
Grossular dodecahedral crystal
Crystal of imperial topaz
Amethyst, a quartz crystal
Prismatic amethyst crystal
Garnet, Concord, Vermont, USA
Almandine
Andradite, New Jersey
Topaz crystal in albite and microcline