Topaz crystal in albite and microcline
Topaz crystals
Topaz gemstone
Topaz specimens
Microcline
Microcline in rock groundmass
Unpolished topaz crystals
Topaz
Topaz gemstones
Elbaite on albite and quartz
Citrine
Emerald crystal, close up
Topaz gem
Microcline crystals and Smoky Quartz
Olivine peridot crystal, close up
Crystal of imperial topaz
Quartz types
Raw citrine crystal
Sherry Topaz
Microdiamond crystal
Sapphire crystal
Citrine gemstones and crystal
Mystic topaz gemstone
Turquoise embedded in iron oxide
Schorl tourmaline crystal stone
Ruby crystal and gems
Tourmaline crystal specimen
Tourmaline crystal specimens
Grossular dodecahedral crystal
Prismatic amethyst crystal
Black tourmaline in mica schist
Garnet crystals on schist
Wollastonite with kolophonite
Opalised fossil
Almandine crystals in schist
Tourmaline crystals in quartzite
Emeralds
Peridotite
Garnet in peridotite
Heat-treated amethyst
Schorl and quartz crystals in groundmass
Quartz crystals coated with pink topaz crystals
Topaz, Minas Gerais, Brazil
Topaz or Beryl crystals
Microcline mineral
Citrine crystals
Amazonite
Graphic tourmaline, light micrograph
Wedge shaped titanite crystal
Uncut diamond
Tourmaline
Cut diamond
Tourmaline crystals in quartz
Andradite crystals
Amethyst
Ruby
Almandine mineral sample
Olivine mineral sample
Garnets in micaschist, light micrograph
Nephrite crystals
Tremolite crystals
Pyrope sand
Blue sapphire stone
Blue Sapphire uncut stone
Opal gem necklace
Jade stone
Indicolite tourmaline faceted stone
Watermelon tourmaline crystalline stone
Hawk's Eye quartz stone
Amethyst geode
Amethyst geodes
Garnet gemstone
Amethyst filled geode
Clinochlore with garnets
Amethyst crystals
Rubellite tourmaline pendant
Uvarovite garnet crystals
Fire opal
'Black' opal cabochon specimen
Orange sapphire gemstone
Pyrargyrite crystals
Grossular crystals in host rock
Rough emeralds
Amethyst geode interior
Spessartine garnet
Watermelon tourmaline
Crushed diamond, SEM
Elbaite mineral
Dravite mineral
Andradite mineral
Demantoid
Uncut diamonds
Amethyst and chalcedony
Lapis lazuli crystals
Ironstone matrix with potch opal
Mineral samples
Grossular garnet crystals on rock surface
Tourmaline embedded in feldspar rock
Elbaite mineral (tourmaline)
Opal
Amazonite mineral
Single amethyst crystal, close up
Amazonite stone
Sapphire crystals in rock groundmass
Staurolite phenocrysts, polarised light micrograph
Almandine
Amethyst gemstones and crystal
Rare bright green Uvarovite Garnet
Green hemimorphite in groundmass
Diamond in host rock
Cordierite crystal
Spinel crystal
Calcite crystal
Kyanite crystal
Gold embedded in quartz groundmass
Raw aquamarine crystal
Pseudomorphic crystal growth
Garnet crystal and rock
Emerald crystal in quartz
Silica rock crystal samples
Geode, thin section micrograph
Native gold
Titanite bearing granite
Turritella agate
Fuchsite mineral stone
Quartz filled concretion
Quartz vein in granite
Graphic granite rock
Granite
Deformed quartz veins in slate
Sphene crystals in groundmass, close-up
Tourmaline crystal
Raw amethyst crystal
Raw garnet crystal
Raw tourmaline crystal
Tourmaline gemstones and crystal
Tourmaline crystal, thin section
Deformation of garnet crystal
Aquamarine crystals
Lazurite crystals in a matrix of calcite
Mass of prismatic aquamarine crystals
Mass of pyramid-shaped amethyst crystals
Tourmaline Pegmatite
Quartz crystal from Sentis, Switzerland.
Ruby crystals, SEM