Cut Kyanite gemstone
Trillion cut tourmaline gemstone
Cut green Paraiba Tourmaline gemstone
Cut Cordierite (Iolite) gemstone
Cut Scapolite gemstone
Cut yellow Vesuvianite gemstone
Cut Quartz gemstone
Cut Zircon gemstone
Cut pink topaz gemstone
Cut green Tourmaline gemstone
Cut pink Topaz gemstone
Cut Watermelon Tourmaline gemstone
Cut Indicolite gemstone
Round cut red Andesine
Cut Spessartine gemstone
Cut Pyrope gemstone
Cut Diopside gemstone
Cut Scapolite round gemstone
Cut Red Spinel gemstone
Cut Aquamarine gemstone
Cut Sapphire gemstone
Cut yellow sapphire gemstone
Oval cut Apatite gemstone
Yellow-green Tourmaline rough
Cut Peridot gemstone
Cut Ruby gemstone
Oval cut Sphene gemstone
Cut pink-violet Kunzite gemstone
Square cut purple Amethyst gemstone
Cut Diaspore gemstone
Garnet
Moss agate
Round cut mauve Spinel gemstone
Cut Sphalerite gemstone
Lapis lazuli, SEM
Concentric banding in agate
Tourmaline
Emerald
Almandine
Tourmaline on quartz
Rough pinkish-red Rubellite
Rare bright green Uvarovite Garnet
Gneiss with garnet, light micrograph
Gneiss with garnet
Tourmaline cross section
Oval cut red Rhodochrosite gemstone
Ruby in zoisite
Cut Rose Quartz gemstone
Kyanite
Prehnite and okenite
Kyanite mineral
Cushion cut diamond gemstone
Brilliant cut diamond gemstone
Zircon crystals on host rock
Rose Quartz
Citrine
Fluorite
Cut Fire Opal gemstone
Tourmaline unworked stones
Peridot pebble and mixed-cut peridot
Blue Kyanite crystals in groundmass
Yellow crystal
Raw garnet crystal
Tourmaline crystal, thin section
Black tourmaline, SEM
Fire Opal
Sample of feldspar
Lizardite in serpentine rock
Agate
Chalcedony
Pallasite meteorite fragment
Aventurine
Uncut emeralds
Sample of muscovite
Axinite
Chrysocolla mineral
Beryl crystals
Quartz coated with silica
Brilliant cut diamond gemstones
Tiger eye, polished surface
Tiger eye, thin section micrograph
Tiger eye, light micrograph
Sherry Topaz
Labradorite sunstone
Purple fluorite
Colourful gemstones
Kyanite, VT
Dendrites in agate
Twinned augite crystals
Smoky quartz
Emerald cut diamond gemstone
Asscher cut diamond gemstone
Heart cut diamond gemstone
Pear cut diamond gemstone
Carnelian
Stilbite crystal group
Asscher cut diamond gemstones
Pink beryl crystal, SEM
blue apatite
Oval cut purple sapphire gemstone
Brilliant cut pink diamond gemstone
Cut Emerald gemstone
Blue rectangular gemstone
Malachite and chrysocolla minerals
Lapis lazuli crystals I
Lapis lazuli crystals II
Asbestos veins in serpentinite
Feldspar and quartz
Quartz crystals, SEM
Wedge shaped titanite crystal
Amethyst crystals
Alexandrite gemstone
Amethyst gemstone
Citrine gemstone
Paragneiss, light micrograph
Enstatite
Tweezers holding alexandrite gemstone
Tool holding amethyst gemstone
Mystic topaz gemstone
Migmatite, light micrograph
Scolecite
Blue labradorite
Sapphires
Large citrine gemstone
Kyanite and Staurolite crystals
Quartz crystal, SEM
Rutile crystals
Calcite crystal
Calcite
Quartz encrusted calcite crystals
Rutilated quartz
Brecciated jasper
Leopard skin jasper close
Leopard skin jasper II
Leopard skin jasper I
Barred olivine chondrule
Trillion cut diamond
Aquamarine gemstones
Aquamarine gemstones and crystal
Diamonds and aquamarine gemstones
Tanzanite
Diamonds under UV light
Polished Chrysocolla cabochons
Neptunite
Rhodonite
Basalt, light micrograph
Kyanite crystal
Apophyllite crystals
Cut Heliodor gemstone
Labradorite