Gneiss
Metamorphic rock (Gneiss)
metamorphic
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Marble
Metamorphic Rock (composed primarily of recrystallized calcite, CaCO3, or dolomite)
metamorphic
Chrysocolla
Hydrated copper phyllosilicate, (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Unakite
Altered Granite (Granitic Metamorphic Rock)
metamorphic
Green Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Black Tourmaline
Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)4)
mineral
Red Jasper
SiO2 (Microcrystalline Quartz)
sedimentary
Granite
Felsic intrusive igneous rock
igneous
Green Aventurine
Quartz (Silicon Dioxide, SiO2) with fuchsite inclusions
mineral
Unakitized Granite
Granitic rock with epidotization
igneous
Fuchsite
K(Al,Cr)2(AlSi3O10)(OH)2
mineral
Chrysocolla
(Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Lepidolite in Quartz
K(Li,Al)3(Si,Al)4O10(F,OH)2 / SiO2
mineral
Sugilite
KNa2(Fe,Mn,Al)2Li3Si12O30
mineral
Rock Salt
Halite (NaCl)
mineral
Fossil Snail
Gastropoda (fossilized)
fossil
Barite
Barium Sulfate (BaSO4)
mineral
Polished Mookaite Jasper
SiO2 (Silicon Dioxide with impurities)
sedimentary
Chrysocolla
Hydrated copper phyllosilicate, (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Limonite Geode / Ironstone Nodule
Hydrated Iron Oxide Hydroxide (FeO(OH)·nH2O)
mineral
Fossiliferous Limestone
Biogenic Sedimentary Rock (Calcium Carbonate, CaCO3)
sedimentary
Granite
Intrusive Igneous Rock
igneous
Sodalite
Na4Al3(SiO4)3Cl (Sodium Aluminum Silicate Chloride)
mineral
Blue Sapphire
Corundum (Al2O3)
gemstone
Iolite
Cordierite (Magnesium Aluminum Silicate, (Mg,Fe)2Al3(AlSi5O18))
gemstone
Moonstone
Orthoclase (KAlSi3O8)
mineral
Quartzite
Metamorphic Quartzite (primarily SiO2)
metamorphic
Amber
Fossilized Tree Resin
gemstone
Fossilized Bone / Dinosaur Fossil
Fossilized vertebrate bone (permineralized)
fossil
Emerald
Beryl (Be3Al2(SiO3)6)
gemstone
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Tiger's Eye
Silicon Dioxide (Quartz pseudomorph after crocidolite)
gemstone
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Fossiliferous Limestone
Biogenic Sedimentary Rock (Calcite, CaCO3)
sedimentary
Fossiliferous Limestone
Calcite-rich sedimentary rock with invertebrate fossils (CaCO3)
sedimentary
Granite
Intrusive Igneous Rock
igneous
Lapis Lazuli
Complex rock composed mainly of lazurite, calcite, and pyrite
gemstone
Asphalt Chunk
Asphalt concrete
man-made composite
Asphalt
Asphalt concrete
sedimentary
Basalt
Extrusive igneous rock
igneous