Microdiamond crystal
Microdiamond crystal, SEM
Diamond in host rock
Crushed diamond, SEM
Magnetite, SEM
Ruby crystals, SEM
Diamonds
Diamond
Garnets in micaschist, light micrograph
Pyrite interspersed with quartz
Quartz coated with silica
Uncut diamond
Cut diamond
Uncut diamonds
Azurite crystals, SEM
Tourmaline crystals in quartz
Almandine
Grossular
Rutilated quartz
Cut and polished diamonds
Diamond gemstones
Quartz and pyrite
Emerald, SEM
Quartz crystals, SEM
Amethyst, SEM
Crystalline manganese, SEM
Polishing cloth cross-section, SEM
Mica in quartz, light micrograph
Agate. polarised light micrograph
Tourmaline crystal, thin section
Polarised LM of thin section of gabbro
Nephrite crystals
Tremolite crystals
Wollastonite with kolophonite
Pyrargyrite crystals
Opalised fossil
Grossular crystals in host rock
Rough emeralds
Tourmaline crystals in quartzite
Lapis lazuli crystals
Diamond cutting
Quartz crystals
Smoky quartz crystals
Nickel dendrites, SEM
Sapphire crystal
Ironstone matrix with potch opal
Herkimer diamonds of quartz mineral
Diamond with garnet inclusion
Pyrite on quartz
Octahedral Fluorite
Asscher cut diamond gemstone
Pink diamonds
Microdiamond, SEM
Lapis lazuli, SEM
Ralstonite
Fluorapatite crystal, SEM
Malachite crystals, SEM
Tourmaline unworked stones
Cullinan diamond replica
Synthetic diamond film production
Synthetic diamond film
Diamond in kimberlite
Pre-cut diamond forms
Diamond cleaning
Electrochemical sensor production
Quartz mineral stone, light micrograph
Chalcopyrite, SEM
Ruby
Rose quartz crystals, SEM
Carbon
Malachite, SEM
Sand, SEM
Black tourmaline in mica schist
Amethyst
Citrine
Tourmaline
Andradite crystals
Almandine mineral sample
Olivine mineral sample
Topaz 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
Schorl tourmaline crystal stone
Amethyst geode
Amethyst geodes
Garnet gemstone
Amethyst filled geode
Clinochlore with garnets
Quartz types
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