Tremolite crystals
Nephrite crystals
Actinolite crystals
Jade sword handle
Jadeite carved dish from China
Nephrite jade specimen
Titanite crystals in actinolite
Jade stone
Rough emeralds
Tremolite, New Jersey, USA.
Galenite and quartz crystals
Actinolite crystals with talc
Pyrargyrite crystals
Tourmaline crystals in quartzite
Lapis lazuli crystals
Asbestos sample
Grossular crystals in host rock
Emeralds
Emerald crystal, close up
Tremolite variety Hexagonite
Anthophyllite asbestos
Fibrous crystals of riebeckite on rock groundmass
Jade gemstones
Amethyst crystals
Chromite
Microdiamond crystal
Wollastonite with kolophonite
Opalised fossil
Crushed diamond, SEM
Chrysotile in groundmass, close-up
Malachite mineral stone
Andradite crystals
Topaz crystals
Tourmaline crystals in quartz
Garnet crystals on schist
Uvarovite garnet crystals
Almandine crystals in schist
Fluorspar crystals
Imperial Jade streaked with green
Grossular garnet crystals on rock surface
Schorl and quartz crystals in groundmass
Metamorphic rock
Amphibolite, light micrograph
Maori Greenstone Jade
Colourful crystals
Orange crystal
Magnetite in quartz
Cuprocassiterite in quartz mica schist
Pyrolusite in quartz
Chabazite crystals in quartz
Quartz encrusted calcite crystals
Orthoclase and quartz crystals
Diamond in host rock
Crystals of haematite in quartz
Pyrite crystals
Ruby
Pyrite crystals in their host rock
Lazurite crystals in a matrix of calcite
Assortment of Gemstones
Uncut diamond
Black tourmaline in mica schist
Amethyst
Citrine
Tourmaline
Cut diamond
Almandine mineral sample
Olivine mineral sample
Garnets in micaschist, light micrograph
Pyrope sand
Blue sapphire stone
Blue Sapphire uncut stone
Opal gem necklace
Indicolite tourmaline faceted stone
Watermelon tourmaline crystalline stone
Hawk's Eye quartz stone
Schorl tourmaline crystal stone
Amethyst geode
Amethyst geodes
Garnet gemstone
Amethyst filled geode
Clinochlore with garnets
Ruby crystal and gems
Rubellite tourmaline pendant
Fire opal
'Black' opal cabochon specimen
Orange sapphire gemstone
Sapphire crystal
Topaz gemstone
Topaz specimens
Amethyst geode interior
Tourmaline crystal specimen
Tourmaline crystal specimens
Spessartine garnet
Watermelon tourmaline
Grossular dodecahedral crystal
Elbaite mineral
Dravite mineral
Andradite mineral
Demantoid
Uncut diamonds
Peridotite
Garnet in peridotite
Amethyst and chalcedony
Topaz crystal in albite and microcline
Ironstone matrix with potch opal
Prismatic amethyst crystal
Olivine peridot crystal, close up
Heat-treated amethyst
Elbaite on albite and quartz
Mineral samples
Tourmaline embedded in feldspar rock
Elbaite mineral (tourmaline)
Opal
Aquamarine prismatic crystals
Quartz and cassiterite crystals
Fluorite crystals
Tremolite, Tyringham, Massachusetts, USA
Tremolite, Canaan, Connecticut, USA
Ruby crystals, SEM
Synthetic gemstones
Tourmaline gemstone
First laser
Sapphire crystals in rock groundmass
Opal on bedrock
Amphibole Asbestos, Maryland, USA
Native gold
Pseudomorphic crystal growth
Agate mineral rock cross section
Jasp agate stone
Jasp agate polished surface
Cabuchon gemstones of jasper
Egyptian jasper stone
Tellurium in quartz
Hessite in quartz
Emerald crystal in quartz
Native gold on quartz
Emerald in quartz
Silica rock crystal samples
Hyacinth quartz
Fire agate
Azurite crystals
Quartz crystals
Aragonite crystals
Almandine
Native copper