Quartzite
Quartzite (SiO2)
metamorphic
Category
Industrial Byproduct (Anthropogenic Rock)
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Limestone
Calcium Carbonate (CaCO3)
sedimentary
Basalt
Basalt (Volcanic Mafic Rock)
igneous
Garnet in Host Rock
Garnet Group (A3B2(SiO4)3)
metamorphic
Vesicular Basalt
Basalt (Mafic volcanic rock)
igneous
Quartz Geode (with possible Manganese or Goethite coating)
Silicon Dioxide (SiO2)
mineral
Mica Schist
Mica Schist (primarily Muscovite or Biotite sheet silicates)
metamorphic
Basalt
Basalt (Mafic volcanic rock)
igneous
Granite Pebble
Granite (Felsic Intrusive Igneous Rock)
igneous
Basalt Scoria
Aphanitic basaltic scoria
igneous
Iron-stained Quartz Vein
Silicon Dioxide (SiO2) with Limonite/Hematite inclusions
mineral
Bicolor Quartz (Milk Quartz with Slag or Dark Inclusions)
Silicon Dioxide (SiO2) with impurities
mineral
Basalt with Porphyritic Texture
Porphyritic Basalt
igneous
Serpentine
Serpentine subgroup (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4
metamorphic
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Conglomerate
Clastic Sedimentary Rock (Conglomerate)
sedimentary
Conglomerate
Conglomerate (Clastic sedimentary rock)
sedimentary
Granite
Phaneritic Felsic Igneous Rock
igneous
Basalt River Stone
Basalt (Mafic volcanic rock)
igneous
Schist
Mica Schist
metamorphic
Coal
Coal (Sedimentary Rock / Organic Rock)
sedimentary
Quartzite Pebble
Metamorphic Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Pumice
Pumice (a vesicular volcanic glass)
igneous
Vesicular Basalt or Scoria
Basalt (extrusive volcanic rock)
igneous
Vesicular Basalt
Extrusive mafic igneous rock (Basalt)
igneous
Basalt
Extrusive mafic igneous rock
igneous
Basalt (Weathered)
Extrusive Igneous Rock (Mafic composition)
igneous
Pumice
Pumice (Vesicular Felsic Glass)
igneous
Quartzite
Metamorphic Quartz-rich Rock
metamorphic
Pink Granite
Granite (Felsic plutonic rock)
igneous
Schist
Mica Schist
metamorphic
Blue Calcite Sphere
Calcium Carbonate (CaCO3)
mineral
Laterite (Red Clay)
Laterite (Fe2O3 · nH2O and Al2O3 · nH2O)
sedimentary
Quartzite
Quartzite (composed primarily of SiO2)
metamorphic
Quartzite
SiO2 (Silicon Dioxide)
metamorphic
Garnet Schist
Almandine-mica schist
metamorphic
Quartz Pebbles
Silicon Dioxide (SiO2)
mineral
Fossiliferous Limestone
Calcite-rich Fossiliferous Limestone (CaCO3)
sedimentary
Basalt
Basalt
igneous
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Quartz with Iron Staining
Silicon Dioxide (SiO2) with Ferruginous Oxides
mineral