Rock Identifier

Category

Anthropogenic (Man Made Product Subject To Geological Processes)

Browse anthropogenic (man made product subject to geological processes) specimens identified by the Rock Identifier community.

Learn about Anthropogenic (Man Made Product Subject To Geological Processes) in the encyclopedia

Zincite

N/A (Non-Geological Object) — N/A

N/A (Non-Geological Object)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Tumbled jasper or chalcedony (Microcrystalline quartz (SiO₂), probably iron-stained jasper/chalcedony) — mineral

Tumbled jasper or chalcedony

Microcrystalline quartz (SiO₂), probably iron-stained jasper/chalcedony

Zebra marble (Banded calcite marble, commonly called zebra marble; chiefly calcite (CaCO₃), sometimes with dolomite and dark silicate or carbonaceous minerals) — metamorphic

Zebra marble

Banded calcite marble, commonly called zebra marble; chiefly calcite (CaCO₃), sometimes with dolomite and dark silicate or carbonaceous minerals

Banded gneiss pebble (Gneiss, likely quartz–feldspar–mica gneiss) — metamorphic

Banded gneiss pebble

Gneiss, likely quartz–feldspar–mica gneiss

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Red-orange jasper pebble (Jasper, microcrystalline quartz (SiO₂), colored mainly by iron oxides) — mineral

Red-orange jasper pebble

Jasper, microcrystalline quartz (SiO₂), colored mainly by iron oxides

Quartz-rich hydrothermal vein specimen, possibly iron-stained quartz with calcite (Quartz (SiO₂), with probable calcite (CaCO₃) and iron-oxide staining) — mineral

Quartz-rich hydrothermal vein specimen, possibly iron-stained quartz with calcite

Quartz (SiO₂), with probable calcite (CaCO₃) and iron-oxide staining

Ferruginous Sandstone (Ironstone) (Clastic Sedimentary Rock (composed of SiO2 with Fe2O3/FeO(OH) cement)) — sedimentary

Ferruginous Sandstone (Ironstone)

Clastic Sedimentary Rock (composed of SiO2 with Fe2O3/FeO(OH) cement)

Fossiliferous Limestone (Murchisonia/Gastropod Limestone) (Biogenic Limestone (Calcium Carbonate, CaCO3)) — sedimentary

Fossiliferous Limestone (Murchisonia/Gastropod Limestone)

Biogenic Limestone (Calcium Carbonate, CaCO3)

Hematite (Iron(III) oxide (Fe2O3)) — mineral

Hematite

Iron(III) oxide (Fe2O3)

Polished orbicular/porphyritic granite or breccia (Likely potassium-feldspar–quartz granite with amphibole/biotite and epidote; exact variety uncertain from the image) — igneous

Polished orbicular/porphyritic granite or breccia

Likely potassium-feldspar–quartz granite with amphibole/biotite and epidote; exact variety uncertain from the image

Quartz vein rock with iron-stained matrix (Quartz (SiO₂), likely with limonite/goethite and minor feldspar or mica) — mineral

Quartz vein rock with iron-stained matrix

Quartz (SiO₂), likely with limonite/goethite and minor feldspar or mica

Limestone (Weathered) (Sedimentary carbonate rock, primarily calcium carbonate (CaCO3)) — sedimentary

Limestone (Weathered)

Sedimentary carbonate rock, primarily calcium carbonate (CaCO3)

Coal (Bituminous Coal / Anthracite) — sedimentary

Coal

Bituminous Coal / Anthracite

Hematite (Iron(III) oxide (Fe2O3)) — mineral

Hematite

Iron(III) oxide (Fe2O3)

Yellow jasper (likely polished/tumbled) (Jasper, microcrystalline quartz (SiO₂), commonly colored by iron oxides) — mineral

Yellow jasper (likely polished/tumbled)

Jasper, microcrystalline quartz (SiO₂), commonly colored by iron oxides

Chalcedony (likely agate) (Microcrystalline quartz, SiO₂; agate is banded chalcedony) — mineral

Chalcedony (likely agate)

Microcrystalline quartz, SiO₂; agate is banded chalcedony

Specular Hematite (Specularite) (Iron Oxide (Fe2O3)) — mineral

Specular Hematite (Specularite)

Iron Oxide (Fe2O3)

Quartzite (River Pebble) (Metamorphosed Quartz-rich Sandstone (SiO2)) — metamorphic

Quartzite (River Pebble)

Metamorphosed Quartz-rich Sandstone (SiO2)

Red Jasper (Opaque Chalcedony) (Jasper / Silicon Dioxide (SiO2) with Ferric Iron inclusions) — mineral

Red Jasper (Opaque Chalcedony)

Jasper / Silicon Dioxide (SiO2) with Ferric Iron inclusions

Sandstone (Sandstone (lithified sand)) — sedimentary

Sandstone

Sandstone (lithified sand)

Polished hematite (specimen identification uncertain) (Hematite, α-Fe₂O₃) — mineral

Polished hematite (specimen identification uncertain)

Hematite, α-Fe₂O₃

Polished red jasper pebble (Jasper, microcrystalline quartz (SiO₂) with iron-oxide impurities) — mineral

Polished red jasper pebble

Jasper, microcrystalline quartz (SiO₂) with iron-oxide impurities

Red jasper (Jasper, microcrystalline quartz (SiO₂) colored mainly by iron oxides) — metamorphic

Red jasper

Jasper, microcrystalline quartz (SiO₂) colored mainly by iron oxides

Tumbled jasper pebble (Jasper, an opaque microcrystalline variety of quartz (SiO₂), commonly colored by iron oxides and hydroxides) — mineral

Tumbled jasper pebble

Jasper, an opaque microcrystalline variety of quartz (SiO₂), commonly colored by iron oxides and hydroxides

Limestone (Calcareous sedimentary rock (CaCO3)) — sedimentary

Limestone

Calcareous sedimentary rock (CaCO3)

Bituminous Coal (Bituminous coal (Organic Sedimentary Rock)) — sedimentary

Bituminous Coal

Bituminous coal (Organic Sedimentary Rock)

Wollastonite (Calcium Inosilicate Mineral, CaSiO3) — mineral

Wollastonite

Calcium Inosilicate Mineral, CaSiO3

Likely basalt (Mafic volcanic rock, chiefly plagioclase and pyroxene, commonly with minor olivine and magnetite) — igneous

Likely basalt

Mafic volcanic rock, chiefly plagioclase and pyroxene, commonly with minor olivine and magnetite

Coal (Bituminous) (Sedimentary carbonaceous rock) — sedimentary

Coal (Bituminous)

Sedimentary carbonaceous rock

White drusy quartz (Quartz, silicon dioxide (SiO₂), with a drusy coating of tiny crystals) — mineral

White drusy quartz

Quartz, silicon dioxide (SiO₂), with a drusy coating of tiny crystals

Golden-brown druzy quartz cluster (Quartz, silicon dioxide (SiO₂), likely iron-stained or included with limonite/goethite) — mineral

Golden-brown druzy quartz cluster

Quartz, silicon dioxide (SiO₂), likely iron-stained or included with limonite/goethite

Tumbled jasper (likely brecciated or red jasper) (Microcrystalline quartz/chalcedony, SiO₂, with iron-oxide inclusions) — gemstone

Tumbled jasper (likely brecciated or red jasper)

Microcrystalline quartz/chalcedony, SiO₂, with iron-oxide inclusions

Red Jasper (Jasper (Silicon Dioxide with Iron Oxide impurities, SiO2 + Fe2O3)) — sedimentary

Red Jasper

Jasper (Silicon Dioxide with Iron Oxide impurities, SiO2 + Fe2O3)

Yellow chalcedony (likely agate) cabochons (Microcrystalline quartz, SiO₂; chalcedony variety, possibly naturally colored or dyed) — gemstone

Yellow chalcedony (likely agate) cabochons

Microcrystalline quartz, SiO₂; chalcedony variety, possibly naturally colored or dyed

Fluorite on Matrix (Calcium Fluoride (CaF2)) — mineral

Fluorite on Matrix

Calcium Fluoride (CaF2)

Green Quartzite (Metamorphic Quartz Sandstone (SiO2)) — metamorphic

Green Quartzite

Metamorphic Quartz Sandstone (SiO2)

Red Jasper (Silicon Dioxide (SiO2) with Iron inclusions) — sedimentary

Red Jasper

Silicon Dioxide (SiO2) with Iron inclusions

Magnetite or Hematite (Iron Stone) (Magnetite (Fe3O4) or Hematite (Fe2O3)) — mineral

Magnetite or Hematite (Iron Stone)

Magnetite (Fe3O4) or Hematite (Fe2O3)

Likely slate (Slate, a fine-grained metamorphic rock composed mainly of mica-group minerals and quartz) — metamorphic

Likely slate

Slate, a fine-grained metamorphic rock composed mainly of mica-group minerals and quartz