Rubellite II
Rubellite I
Pink tourmaline crystals growing on mica
Tourmaline pegmatite
Tourmaline Pegmatite
Rubellite Tourmaline in Lepidolite Mica
Tourmaline in pegmatite host rock
紅電気石
Rubellite
Crystals of green toumaline and pink lepidolite
Tourmaline in quartz
Elbaite crystal, variety Tourmaline
Tourmaline quartz
Indicolite tourmaline faceted stone
Green Tourmaline in Muscovite, Maine
Rubellite crystals
Elbaite mineral
Elbaite mineral (tourmaline)
Verdite green tourmaline gemstone
Tourmaline gemstone
Rubellite tourmaline pendant
Aquamarine in muscovite matrix
Aquamarine in muscovite matrix, close
Luxulyanite, thin section, LM
Granitic pegmatite
Emeralds
Elbaite on albite and quartz
Bi-coloured tourmaline crystals
Rough pinkish-red Rubellite
Tourmaline gem
Black tourmaline in mica schist
Tourmaline mica in slate
Schorl and quartz crystals in groundmass
電気石
オパール
Tourmaline gem, 365 carat
Tourmaline mineral, light micrograph
Tourmaline crystals in quartz
Tourmaline crystals in matrix
Tourmaline
Schorl variety of Tourmaline, Namibia
Tourmaline crystals
Albite with Tourmaline
Tourmaline crystals on Albite
Watermelon tourmaline
Dravite mineral
Tourmaline in gneiss rock
Tourmaline gemstones
Watermelon tourmaline crystalline stone
Hawk's Eye quartz stone
Schorl tourmaline crystal stone
Granite specimen
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
Raw tourmaline crystal
Tourmaline gemstones and crystal
Schorl (black Toutmaline)
Tourmaline specimen
Polarized light experiments, 1847
Tourmaline crystal
Blue tourmaline crystals
Quartz and green tourmaline crystals
Tourmaline gemstones in quartz
Gyrolith on a natrolite substrate
Slice through fossilised wood revealing opal
Tourmaline Crystals, Minas Gerais, Brazil
Opal gemstones
Single piece of blue opal
Graphic tourmaline, light micrograph
Opal rock
Black opal gemstone
Snowflake obsidian
Obsidian mineral stone
Blue opal gemstones
Schorl, the black variety of Tourmaline
Tourmaline crystals in quartzite
A cut and polished fire opal
Fire opal birthstone
Opal mineral stone
Aquamarine crystals
Pegmatite specimen
Three pieces of blue opal
Kentallenite - Ballaculish, Scotland, LM
Tourmaline crystal, thin section
Black tourmaline, SEM
Tourmaline crystal specimen
Tourmaline crystal specimens
Yellow-green Tourmaline rough
Trillion cut tourmaline gemstone
Cut green Paraiba Tourmaline gemstone
Mylonite, light micrograph
Opal birthstone
Emerald in host rock
Emerald in quartz hostrock
Opal gemstone
Brazilianite crystals in calcite
黒曜石
Cut Indicolite gemstone
蛋白石
Zoisite in pegmatite groundmass
Brazilianite crystals
石板にシルクを三角に折りアクセサリーを配置
Cut Watermelon Tourmaline gemstone
Tourmaline embedded in feldspar rock
Obsidian, a glassy igneous rock
Obsidian
Obsidian bubbles
Obsidian flow
Quartz-feldspar porphyry
Pebbles of snowflake obsidian rock lying on sand
Obsidian rock
Snowflake Obisidian
Snowflake obsidian gemstone on white background
Cut green Tourmaline gemstone
Opalised fossil
Opal in its host rock
Opal gem and rock
Fire opal
Opal surface
Opal on bedrock
Ironstone matrix with potch opal
Potch opal with smooth and rough surface
Opal gem necklace
Opal specimens
Obsidian-rich lava flow, Tenerife
Rhyolitic geode
Mahogany obsidian
Two-mica granite
Obsidian lava
Obsidian dome
Limburgite
Pegmatite, New Hampshire, USA
Niobite in host rock
Niobite crystal
Opal
Round polished Common Opal
Tourmaline cross section
Tourmaline schorl specimen
Tourmaline on quartz
Fire Opal