Sandstone
Sandstone (composed predominantly of Quartz, SiO2)
Category
Browse man made composite (lithified equivalent of sedimentary) specimens identified by the Rock Identifier community.
Sandstone
Sandstone (composed predominantly of Quartz, SiO2)
Sandstone Pebble (Quartzite-rich)
Clastic Terrigenous Sedimentary Rock (SiO2 dominant)
Limestone
Calcium Carbonate (CaCO3)
Sandstone (with differential weathering)
Arenite / Quartz Sandstone (SiO2)
Sandstone (specifically an Iron-Concretion)
Arenite with Iron Oxide (Limonite/Goethite) cementation
Iron-rich sandstone or ferruginous quartzite
Hematite/goethite-bearing quartz sandstone; possibly weakly metamorphosed to quartzite
Chalcedony
Silicon Dioxide (SiO2)
Sand Tiger Shark Tooth
Carcharias taurus
Sandstone
Arenite
Sandstone
Clastic Sedimentary Rock
Pink Quartz
Silicon Dioxide (Quartz), SiO2
Sandstone
Sedimentary Rock (Quartzose Sandstone)
Sandstone (Quartzose Sandstone)
Clastic Sedimentary Rock (primarily SiO2)
Turquoise
Hydrated phosphate of copper and aluminium: CuAl6(PO4)4(OH)8·4H2O
Basalt
Basalt (Aphanitic Mafic Igneous Rock)
Granite
Phaneritic Igneous Rock (composed of quartz, alkali feldspar, and plagioclase)
Granite
Phaneritic Igneous Rock (composed primarily of Quartz SiO2, Alkali Feldspar, and Plagioclase)
Granite
Intrusive Igneous Rock (composed primarily of quartz, alkali feldspar, and plagioclase)
Granite fragment
Granite
Crystalline limestone (marble-like calcite rock)
Calcite, CaCO₃; likely recrystallized limestone (marble)
Quartzite or Quartz Vein Material
SiO2
Rhodochrosite with Quartz
Manganese Carbonate (MnCO3) with Silicon Dioxide (SiO2)
Sandstone or Weathered Conglomerate
Sedimentary Rock (Quartzose Sandstone / Lithic Arenite)
Sandstone (Quartzose)
Arenite (primarily SiO2)
Sandstone (Greywacke)
Arenite / Wacke (SiO2 + varied clasts)
Sandstone
Arenite (SiO2 with various cementing minerals)
Limestone with Lichen
Sedimentary Calcium Carbonate (CaCO3)
Sandstone
Arenite (Sandstone)
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
Sandstone
Arenite (primarily SiO2)
Sandstone
Clastic Sedimentary Rock
Rhodochrosite
Manganese Carbonate (MnCO3)
Granite
Phaneritic plutonic rock (Quartz, Feldspar, Mica)
Quartz pebble
Silicon dioxide (SiO2)
Sandstone
Arenite
Limestone
Calcium Carbonate (CaCO3)
Porphyritic Basalt or Diabase with Plagioclase Phenocrysts
Porphyritic Basalt or Diabase; Mineral: Plagioclase Feldspar
Sandstone (Quartzose)
Arenite (composed primarily of SiO2)
Conglomerate
Conglomerate
Weathered sandstone fragment
Sandstone, primarily quartz (SiO₂) with feldspar and iron-oxide cement
Quartz pebble
Silicon Dioxide (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)