Quartzite
Metamorphic Quartzite (SiO2)
Category
Browse man made composite (lithified equivalent of sedimentary) specimens identified by the Rock Identifier community.
Quartzite
Metamorphic Quartzite (SiO2)
Sandstone (Ferruginous)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)
Sandstone
Arenite (composed primarily of SiO2)
Limestone
Calcium Carbonate (CaCO3)
Quartzite
Metamorphic Quartz Sandstone
Quartzite
Metamorphic Quartzite (SiO2)
Limestone
Calcium Carbonate (CaCO3)
Sandstone
Arenite (composed primarily of SiO2)
Sandstone
Arenite
Limestone
Calcium Carbonate (CaCO3)
Sandstone (Quartzose)
Arenite (primarily SiO2)
Limestone Pebble
Sedimentary Calcium Carbonate (CaCO3)
Sandstone (likely Graywacke or Arkosic varieties)
Arenite (composed primarily of SiO2)
Limestone
Calcium Carbonate (CaCO3)
Limestone
Calcium Carbonate (CaCO3)
Sandstone (Quartzite-rich)
Clastic Sedimentary Rock (primarily SiO2)
Sandstone
Arenite (SiO2 based)
Banded malachite cabochon
Malachite, Cu₂CO₃(OH)₂; the dark bands may be manganese-oxide or other sulfide-rich matrix, and could also indicate a composite or treated specimen
Sandstone
Arenite (primarily SiO2)
River Stone (Limestone)
Sedimentary Calcium Carbonate (CaCO3)
Sandstone
Arenite (composed primarily of SiO2)
Sandstone
Arenite (Siliclastic sedimentary rock), SiO2 + various minerals
Limestone
Sedimentary Calcium Carbonate (CaCO3)
Limestone (with potential fossil inclusions)
Calcium Carbonate (CaCO3)
Limestone
Calcium Carbonate (CaCO3)
Gabbro
Phaneritic mafic intrusive igneous rock
Sandstone (likely Arkosic)
Clastic Sedimentary Rock
Sandstone
Arenite (primarily SiO2)
Limestone
Calcium Carbonate (CaCO3)
Limestone
Calcium Carbonate (CaCO3)
Sandstone (with Iron Staining)
Arenite (composed primarily of SiO2 with Fe2O3 staining)
Sandstone
Clastic Sedimentary Rock (composed mostly of SiO2)
Limestone (Grey and White specimens)
Calcium Carbonate (CaCO3)
Sandstone Grain
Clastic Sedimentary Rock Grain (SiO2 dominated)
Quartzite
Metamorphic Rock (Mainly SiO2)
Limestone
Sedimentary Calcium Carbonate (CaCO3)
Weathered iron-rich concretion (probable limonite/goethite)
Limonite–goethite aggregate, approximately FeO(OH)·nH₂O
Sandstone
Arenite (SiO2 + various cementing minerals)
Limestone
Calcium Carbonate (CaCO3)
Limestone
Calcium Carbonate (CaCO3)
Sandstone
Arenite (primarily SiO2)
Diabase (Greenstone)
Diabase (Dolerite)