Sandstone
Arenite (primarily SiO2 - Silicon Dioxide)
sedimentary
Category
Synthetic Polymer (Synthetic Material)
Browse synthetic polymer (synthetic material) specimens identified by the Rock Identifier community.
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Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Sandstone
Arenite (primarily Quartz Arenite)
sedimentary
Glacial Quartzite Cobble
Meta-orthoquartzite (SiO2)
metamorphic
Sandstone (Yellow/Tan)
Clastic sedimentary rock (primarily SiO2 with iron oxide staining)
sedimentary
Limestone (River Stone)
Limestone (Calcium Carbonate, CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Amethyst Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (primarily SiO2)
sedimentary
Serpentinite
Serpentinite (composed primarily of minerals in the serpentine group: (Mg,Fe)3Si2O5(OH)4)
metamorphic
Schist
Mica Schist (Metamorphic Rock)
metamorphic
Sandstone
Arenite (primarily SiO2)
sedimentary
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartzite pebble
Quartzite (SiO2)
metamorphic
Red Sandstone
Arenite with iron oxide (Hematite) cement
sedimentary
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Coquina
Biogenic Limestone (Calcite/Aragonite)
sedimentary
Red Sandstone
Arenite (predominantly SiO2 with Fe2O3 staining)
sedimentary
Quartzite Pebbler
Quartzite (SiO2)
metamorphic
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone
Arenite/Quartz Arenite
sedimentary
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Sandstone (Ferruginous)
Arenite (Fe2O3 staining)
sedimentary
Sandstone (Quartzose)
Arenite (composed primarily of SiO2)
sedimentary
Granite
Phaneritic Plutonic Igneous Rock
igneous
Rhodonite
Manganese Inosilicate (Mn,Fe,Mg,Ca)SiO3
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
White Quartz
Silicon Dioxide (SiO2)
mineral
Porphyry (Basaltic / Andesitic Porphyry)
Porphyritic Basalt / Porphyritic Andesite
igneous
White Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Granite
Intrusive igneous rock
igneous
Quartz
Silicon Dioxide (SiO2)
mineral
Biotite (Mica)
K(Mg,Fe)3AlSi3O10(OH,F)2
mineral
Bauxite
Bauxite (Al(OH)3, γ-AlO(OH), and α-AlO(OH))
sedimentary
Quartz (Milky/Yellowish variety)
Silicon Dioxide (SiO2)
mineral
Red Jasper with Quartz
Microcrystalline Quartz (SiO2)
sedimentary