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