Uncut diamond
Uncut diamonds
Diamond in host rock
Cut diamond
Crushed diamond, SEM
Diamond
Diamonds
Microdiamond crystal
Blue Sapphire uncut stone
Asscher cut diamond gemstone
Cordierite crystal
Spinel crystal
Uncut diamond from Africa
Diamond with garnet inclusion
Diamond gemstones
Pink diamonds
Diamond in kimberlite
Corundum crystal
Torbernite crystal
Herkimer diamonds of quartz mineral
Cut and polished diamonds
Topaz specimens
Tourmaline crystals in quartz
Ruby
Blue sapphire stone
Indicolite tourmaline faceted stone
Sapphire crystal
Lapis lazuli crystals
Cushion cut diamond gemstone
Brilliant cut diamond gemstones
Brilliant cut diamond gemstone
Rough diamond
Diamond cleaning
Cullinan diamond replica
Diamond drill bit
Synthetic diamond film production
Synthetic diamond film
The Centenary Diamond
Pre-cut diamond forms
Diamond grading certificate
Diamond processing, Siberia, Russia
Trillion cut diamond
Venetia Diamond Mine, South Africa
Diamond theft reward poster, April 1965
Black tourmaline in mica schist
Citrine
Tourmaline
Andradite crystals
Amethyst
Almandine mineral sample
Olivine mineral sample
Garnets in micaschist, light micrograph
Nephrite crystals
Tremolite crystals
Topaz crystals
Pyrope sand
Opal gem necklace
Jade 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
Garnet crystals on schist
Amethyst crystals
Rubellite tourmaline pendant
Uvarovite garnet crystals
Fire opal
'Black' opal cabochon specimen
Orange sapphire gemstone
Topaz gemstone
Wollastonite with kolophonite
Pyrargyrite crystals
Opalised fossil
Grossular crystals in host rock
Rough emeralds
Almandine crystals in schist
Tourmaline crystals in quartzite
Amethyst geode interior
Tourmaline crystal specimen
Tourmaline crystal specimens
Spessartine garnet
Watermelon tourmaline
Grossular dodecahedral crystal
Elbaite mineral
Dravite mineral
Andradite mineral
Demantoid
Emeralds
Peridotite
Garnet in peridotite
Amethyst and chalcedony
Topaz crystal in albite and microcline
Emerald crystal, close up
Ironstone matrix with potch opal
Prismatic amethyst crystal
Olivine peridot crystal, close up
Heat-treated amethyst
Elbaite on albite and quartz
Mineral samples
Grossular garnet crystals on rock surface
Schorl and quartz crystals in groundmass
Tourmaline embedded in feldspar rock
Elbaite mineral (tourmaline)
Opal
Diamond cutting
Diamonds under UV light
Orange crystal
Quartz types
Yellow diamond
Raw aquamarine crystal
Diamond ring
Diamond necklace
Diamonds and diamond ring
Tool holding diamond
Diamond miners, South Africa
Raw citrine crystal
Allende meteorite specimen
Mineral exploration drilling, Kenya