Agate
Sinclair Stammers/science Photo Library
Silica-rich Soil On Mars
Nasa/jpl/cornell/science Photo Library
Smoky Quartz Crystals #1
Michael Clutson/science Photo Library
Brecciated Agate Stone #1
Natural History Museum, London/science Photo Library
Information Storage In Dna And Silica
Alfred Pasieka
Agate Silica Crystals In Stone
Natural History Museum, London/science Photo Library
Information Storage In Dna And Silica #1
Alfred Pasieka
Agate Cabuchon Stone
Natural History Museum, London/science Photo Library
Carnelian Gemstone
Natural History Museum, London/science Photo Library
Brecciated Agate Stone
Natural History Museum, London/science Photo Library
Dyed Agate Slice #1
Natural History Museum, London/science Photo Library
Opal Gemstone
Natural History Museum, London/science Photo Library
Quartz Crystal And Limonite Mineral
Dr Juerg Alean
Quartz Needle Crystals
Dr Juerg Alean
Double-ended Quartz Crystal
Dr Juerg Alean
Japanese Twin Quartz Crystal
Dr Juerg Alean
Quartz Crystals #3
Science Photo Library
Agate Stone Cross Section #1
Natural History Museum, London/science Photo Library
Amethyst
Natural History Museum, London/science Photo Library
Turritella Agate
Natural History Museum, London/science Photo Library
Celestite Crystals
Natural History Museum, London/science Photo Library
Agate Polished Cross Section
Natural History Museum, London/science Photo Library
Slice Of Dyed Agate
Natural History Museum, London/science Photo Library
Agate Stone Cross Section And Patterns
Natural History Museum, London/science Photo Library
Amethyst Geode
Natural History Museum, London/science Photo Library
Tourmaline Crystals In Quartz
Pascal Goetgheluck/science Photo Library
Spotted Jasper Stone
Natural History Museum, London/science Photo Library
Chiastolite Stone
Natural History Museum, London/science Photo Library
Agate Cross Section And Layers #3
Natural History Museum, London/science Photo Library
Cross Section Of Agate
Natural History Museum, London/science Photo Library
Agate Objects
Natural History Museum, London/science Photo Library
Leopardskin Jasper Stone
Natural History Museum, London/science Photo Library
Brecciated Agate Stone #3
Natural History Museum, London/science Photo Library
Crystal Geode
Kaj R. Svensson
Agate Stone Cross Section
Natural History Museum, London/science Photo Library
Cross Section Of Hollow Agate
Natural History Museum, London/science Photo Library
Quartz Mineral Stone
Natural History Museum, London/science Photo Library
Quartz Crystals
Michael Clutson/science Photo Library
Botswana Agate Stones #1
Natural History Museum, London/science Photo Library
Quartz Crystals
Pascal Goetgheluck/science Photo Library
Dyed Agate Slice
Natural History Museum, London/science Photo Library
Cross Section Of Agate Stone
Natural History Museum, London/science Photo Library
Cabuchon Gemstones Of Jasper
Natural History Museum, London/science Photo Library
Agate Stone Cross Section #3
Natural History Museum, London/science Photo Library
Amethyst #1
Natural History Museum, London/science Photo Library
Agate Mineral Rock Cross Section #1
Natural History Museum, London/science Photo Library
Kyanite Crystal
Natural History Museum, London/science Photo Library
Agate Mineral Rock Cross Section #2
Natural History Museum, London/science Photo Library
Round Agate Geode
Natural History Museum, London/science Photo Library
Dyed Agate Slice #2
Natural History Museum, London/science Photo Library
Flame Agate Stone Pattern #1
Natural History Museum, London/science Photo Library
Garnet Gemstone
Natural History Museum, London/science Photo Library
Brecciated Jasper Stone
Natural History Museum, London/science Photo Library
Cross Section Of Jasp Agate
Natural History Museum, London/science Photo Library
Jasp Agate Stone #1
Natural History Museum, London/science Photo Library
Botswana Agate Stone #1
Natural History Museum, London/science Photo Library
Lace Agate Stone
Natural History Museum, London/science Photo Library
Jasper Polished Stone
Natural History Museum, London/science Photo Library
Quartz Mineral Stone #1
Natural History Museum, London/science Photo Library
Chalcopyrite
Natural History Museum, London/science Photo Library
Agate Stone Patterns #1
Natural History Museum, London/science Photo Library
Calcite Crystal
Natural History Museum, London/science Photo Library
Jasp Agate Polished Surface
Natural History Museum, London/science Photo Library
Mocha Agate With Veined Pattern
Natural History Museum, London/science Photo Library
Agate Cross Section And Layers #2
Natural History Museum, London/science Photo Library
Round Agate Geode #1
Natural History Museum, London/science Photo Library
Fire Or Mexicagate
Natural History Museum, London/science Photo Library
Agate
Pascal Goetgheluck/science Photo Library
Quartz Types
Natural History Museum, London/science Photo Library
Moss Agate Stone
Natural History Museum, London/science Photo Library
Agate Stone With Layers Of Colour
Natural History Museum, London/science Photo Library
Agate Mineral Rock Cross Section #5
Natural History Museum, London/science Photo Library