Round cut red Andesine
Cut Zircon gemstone
Cut Cordierite (Iolite) gemstone
Cut Scapolite gemstone
Cut Kyanite gemstone
Cut yellow Vesuvianite gemstone
Cut Quartz gemstone
Trillion cut tourmaline gemstone
Cut green Paraiba Tourmaline gemstone
Cut Scapolite round gemstone
Cut Diopside gemstone
Cut Indicolite gemstone
Cut Pyrope gemstone
Cut pink topaz gemstone
Cut green Tourmaline gemstone
Cut pink Topaz gemstone
Cut Watermelon Tourmaline gemstone
Cut Spessartine gemstone
Garnet
Cut Red Spinel gemstone
Round cut mauve Spinel gemstone
Oval cut Sphene gemstone
Yellow-green Tourmaline rough
Cut Diaspore gemstone
Ruby in zoisite
Gneiss with garnet
Oval cut Apatite gemstone
Cut Ruby gemstone
Cut Sphalerite gemstone
Cut pink-violet Kunzite gemstone
Rough pinkish-red Rubellite
Concentric banding in agate
Emerald
Almandine
Rare bright green Uvarovite Garnet
Rose Quartz
Citrine
Gneiss with garnet, light micrograph
Cut Peridot gemstone
Cut Sapphire gemstone
Cut yellow sapphire gemstone
Square cut purple Amethyst gemstone
Moss agate
Oval cut red Rhodochrosite gemstone
Sample of feldspar
Lizardite in serpentine rock
Cut Aquamarine gemstone
Lapis lazuli, SEM
Zircon crystals on host rock
Tourmaline
Tourmaline on quartz
Tourmaline cross section
Labradorite sunstone
Raw garnet crystal
Prehnite and okenite
Purple fluorite
Cut Rose Quartz gemstone
Tourmaline crystal, thin section
Twinned augite crystals
Black tourmaline, SEM
Smoky quartz
Fire Opal
Peridot pebble and mixed-cut peridot
Cut Fire Opal gemstone
Fluorite
Sample of muscovite
Asbestos veins in serpentinite
Feldspar and quartz
Axinite
Chrysocolla mineral
Beryl crystals
Quartz coated with silica
Tourmaline unworked stones
Yellow crystal
Aventurine
Uncut emeralds
Colourful gemstones
Sherry Topaz
Enstatite
Agate
Chalcedony
Pallasite meteorite fragment
Quartz crystals, SEM
Quartz crystal, SEM
Kyanite
Cushion cut diamond gemstone
Brilliant cut diamond gemstones
Brilliant cut diamond gemstone
Neptunite
Tiger eye, polished surface
Tiger eye, thin section micrograph
Tiger eye, light micrograph
Carnelian
Wedge shaped titanite crystal
Amethyst gemstone
Diamond
Moonstone
Mystic topaz gemstone
Polished oval Hawk's Eye Quartz
Oval polished Smithsonite
Dendrites in agate
Stilbite crystal group
Pink beryl crystal, SEM
Asscher cut diamond gemstones
Red rectangular gemstone
Biotite mineral in orthopyroxene
Hornblende crystals
Microcline mineral
Malachite and chrysocolla minerals
Pyroxene crystal, thin section
Scolecite
Selenite gypsum
Rhodonite
Heart cut diamond gemstone
Leopard skin jasper close
Leopard skin jasper II
Leopard skin jasper I
Oval polished Onyx
Brilliant cut pink diamond gemstone
Amethyst crystals
A lump of translucent agate
Rutile crystals
Brazilianite crystals
Calcite crystal
Calcite
Quartz encrusted calcite crystals
Smoky quartz crystals
Alexandrite gemstone
Tweezers holding alexandrite gemstone
Citrine gemstone
Pink gemstone in the shape of heart
Pink gemstones in the shape of heart
Purple rectangular gemstone
Pink rectangular gemstone
Blue rectangular gemstone
Zinnwaldite mineral group
Trillion cut diamond
Brecciated jasper
Cut Emerald gemstone
Round polished Common Opal
Grossular garnet crystals on rock surface
Citrine crystal group
Blue labradorite
Rubies
blue apatite
Lapis lazuli crystals I
Lapis lazuli crystals II
Oolitic limestone, light micrograph
Nailhead calcite and galena
Raw turquoise
Emerald cut diamond gemstone
Asscher cut diamond gemstone
Pear cut diamond gemstone
Oval cut purple sapphire gemstone
Barred olivine chondrule
Apophyllite on calcite
Rutilated quartz