Quartz
Silicon Dioxide (SiO2)
mineral
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Basalt
Extrusive Igneous Rock (Mafic)
igneous
Green Aventurine
Quartz (SiO2) with fuchsite inclusions
mineral
Opal
Hydrated amorphous silica (SiO2·nH2O)
mineral
Carnelian
Silicon Dioxide (Chalcedony variety), SiO2
mineral
Green Quartz / Chrysoprase / Sea Glass
Silicon Dioxide (SiO2)
mineral
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(F,OH)2)
mineral
Ruby
Corundum (Al2O3:Cr)
gemstone
Garnet
Almandine/Pyrope Garnet (Silicate Mineral Group)
mineral
Goniatite Fossil
Order Goniatitida
fossil
Garnet
Almandine/Pyrope Garnet (X3Y2(SiO4)3)
mineral
Bornite
Cu5FeS4
mineral
Basalt Pebble
Extrusive Igneous Rock
igneous
Granite
Intrusive Igneous Rock
igneous
Quartzite
Metamorphic Quartzite
metamorphic
Granite
Felsic intrusive igneous rock
igneous
Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone
Sedimentary Rock (Quartz Sandstone)
sedimentary
Sandstone
Sedimentary Rock (Quartz Sandstone)
sedimentary
Sapphire
Corundum (Al2O3)
gemstone
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Bituminous Coal
Coal (Sedimentary Rock)
sedimentary
Yellow Sapphire
Corundum (Al2O3:Fe)
gemstone
Carved Soapstone Alligator
Steatite (talc schist)
metamorphic
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Granite
Felsic intrusive igneous rock
igneous
Chalcopyrite
Copper iron sulfide (CuFeS2)
mineral
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Chert / Flint Nodule
Microcrystalline Quartz (SiO2)
sedimentary
Quartzite
Metamorphic Quartzite
metamorphic
Lapis Lazuli
(Na,Ca)8(AlSiO4)6(SO4,S,Cl)2 (Complex silicate rock)
rock
Native Copper
Copper (Cu)
mineral
Red Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Sodalite
Sodalite (Na8Al6Si6O24Cl2)
mineral
Hematite
Hematite (Fe2O3)
mineral
Agate Geode Nodule
Chalcedony / Quartz (SiO2)
mineral
Blue Agate Slice
Chalcedony (SiO2)
gemstone
Carnelian Agate
Chalcedony (SiO2)
mineral
Shark Tooth Fossil
Chondrichthyes (class) fossilized tooth
fossil
Peacock Ore
Bornite (Cu5FeS4) with surface tarnish
mineral
Red Jasper
Silicon Dioxide (SiO2) with iron inclusions
sedimentary
Weathered Sedimentary Rock with Liesegang Rings
Sandstone or Siltstone with Iron Oxide Banding
sedimentary