Gemstones, composite image
Tiger eye
Five polished ruby gemstones
Jasper
Quartz monzonite
Quartz boulder
Brecciated quartz
Herkimer diamonds
Jasper breccia rock
Asscher cut diamond gemstone
Pink diamonds
Moonstone gemstones
Fluorite
Tiger's eye and Hawk's eye gemstones
Three lumps of gold, close up
Amethyst gemstones
Types of diamonds, 19th century
Rutile crystals
Carnelian agate
Quartz crystals
Magnetite in quartz
Opal
Titanite crystals in actinolite
Quartz in sphalerite
Laguna agate
Agua Nueva agate
Mounted India dendritic agate
Mahogany obsidian
Moss Agate stone
Banded Amethyst stone
Amethyst
Beryl stone
Calcite crystal
Calcite
Chalcopyrite
Garnet gemstone
Jasper polished stone
Obsidian flow
Lapis lazuli
Emerald crystal in quartz
Mineral exploration drilling, Kenya
Mining core samples, Kenya
Agate
Jade sword handle
Emerald in quartz
Quartz encrusted calcite crystals
Two-mica granite
Agate geode
Amethyst geode interior
Garnet
Tourmaline specimen
Metamorphic rock
Elbaite mineral
Red and white sandstone
Ruby in zoisite
Sand, SEM
Concentric banding in agate
Lapis lazuli specimen
Pink rectangular gemstone
Imperial Jade streaked with green
Prismatic amethyst crystal
Olivine peridot crystal, close up
Grossular garnet crystals on rock surface
Citrine
Cuprite crystals, close-up
Blue benitoite and white natrolite
Chrysocolla
Cut and polished jasper
Botswana agate stones
Agate slice
Blue lace agate
Peridot gemstones
Rough diamond
Topaz gemstones
Rough opal
Aquamarine gemstones
Colourful gemstones
Assortment of Gemstones
Corundum crystal
Cordierite crystal
Torbernite crystal
Raw aquamarine crystal
Black tourmaline in mica schist
Azurite crystals
Quartz
Native gold
Iron oxide precipitation in agate
Smoky quartz crystals
Sample of Labradorite
Andradite crystals
Cuprocassiterite in quartz mica schist
Peridot
Siderite mineral
Almandine mineral sample
Olivine mineral sample
Quartz and schist outcrops
Cubic zirconia
Nephrite crystals
Titanite bearing granite
Pseudomorphic crystal growth
Molybdenite in quartz monzonite
Galenite and quartz crystals
Agate in amethyst
Moctezuma agate
Cryptocrystalline agate
Thunder egg agate
Vein agate
Chrysoprase
Rose quartz mineral, artwork
Colourful crystals
Prasiolite mineral
Zeolite in quartz
Pyrolusite in quartz
Topaz crystals
Hertfordshire puddingstone
Pyrope sand
Garnet-bearing rock
Beryl gem, cut stone
Agate mineral rock cross section
Jasp agate stone
Jasp agate polished surface
Dyed agate slice
Amethyst stone
Chiastolite stone
Opal in its host rock
Amethyst filled geode
Obsidian
Aventurine
Opal gem and rock
Tellurium in quartz
Hessite in quartz
Quartz vein in gneiss rock
Fire opal
Diamond drill bit