Sandstone
Arenite (specifically sublithic or quartz arenite)
sedimentary
Category
Not A Natural Rock (Man Made Composite)
Browse not a natural rock (man made composite) specimens identified by the Rock Identifier community.
Learn about Not A Natural Rock (Man Made Composite) in the encyclopedia
View all →
Sandstone
Arenite (SiO2 composition dominant)
sedimentary
Granodiorite
Intrusive Igneous Rock
igneous
Slag (Industrial Glass/Metal)
Ferrous slag or Glassy silicate byproduct
Antropogenic rock (Man-made)
Sandstone
Sedimentary Rock (Quartz Sandstone)
sedimentary
Diamond
Carbon (C)
gemstone
Chert / Flint
Cryptocrystalline quartz (SiO2)
sedimentary
Banded agate pendant (likely carnelian or brown-and-white chalcedony agate)
Agate, a banded variety of chalcedony; microcrystalline quartz, SiO₂, with iron-oxide coloration
gemstone
Red Sandstone Pebble
Sedimentary quartz sandstone
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Smooth river pebble
Indeterminate lithology; likely fine-grained quartz-rich sandstone, siltstone, or weathered chert
sedimentary
Diamond
Native Carbon (C)
mineral
Sandstone
Sedimentary Rock (Quartz arenite)
sedimentary
Sandstone
Sedimentary Rock (Quartz Sandstone)
sedimentary
Granite
Felsic intrusive igneous rock
igneous
Quartz Pebble (Beach Chalcedony)
Silicon Dioxide (SiO2)
mineral
Chert (White Chert/Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Green Glass Cullet / Recycled Glass
Amorphous Silicon Dioxide (SiO2) with various metal oxides
Man-made Glass (Not a natural rock or mineral)
Green cabochon gemstone, likely aventurine or dyed chalcedony
Indeterminate from image; possible quartz variety (SiO₂), including aventurine quartz or chalcedony
gemstone
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Diamond (or Diamond Simulant)
Carbon (C)
mineral
Pink Granite
Phaneritic Felsic Igneous Rock (composed of orthoclase, quartz, and plagioclase)
igneous
Slag (Industrial Byproduct)
Ferro-silicate glass (Slag)
Anthropogenic (Man-made industrial deposit)
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Sandstone (Pebble)
Sandstone (SiO2 with matrix/cement)
sedimentary
Sandstone or Limestone
Arenite or Calcareous Sedimentary Rock
Sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary
Greenstone
Metabasalt / Metavolcanic rock
metamorphic
Polished white chalcedony or milky quartz pebble
Chalcedony, microcrystalline quartz (SiO₂), possibly with iron-oxide staining or a minor mineral inclusion
mineral
Sandstone (River Stone)
Arenite (composed primarily of SiO2)
sedimentary
Sandstone (likely Greywacke or Siltstone variety)
Arenite / Siltstone (primarily SiO2)
sedimentary
Chert (Field-collected Arrowhead-shaped Fragment)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Pearl
Aragonite (CaCO3) with Conchiolin
mineral
Chert (often called Flint)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Diabase (Dolerite)
Diabase
igneous
Asphalt Chunk (with aggregate)
Bituminous concrete / Anthropogenic conglomerate
sedimentary (anthropogenic/man-made conglomerate)
Note on Image Identification: Textile
N/A (Anthropogenic material)
not a rock
Sandstone
Arenite (primarily SiO2)
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Basalt
Basalt
igneous
Ferrosilicon Slag (Industrial Vitrified Glass)
Vitreous Silicate Residue
Antropogenic (Man-made industrial byproduct)
Chalcedony (Agate/Chert variety)
Silicon Dioxide (SiO2)
mineral