Rock Identifier

Category

Man Made Material (Metal)

Browse man made material (metal) specimens identified by the Rock Identifier community.

Petrified Wood (Silicified Fossil) (Silicified Wood (SiO2)) — sedimentary

Petrified Wood (Silicified Fossil)

Silicified Wood (SiO2)

Ruby (Corundum (Al2O3 with Chromium traces)) — mineral

Ruby

Corundum (Al2O3 with Chromium traces)

Jadeite (Jade) (NaAlSi2O6 (Sodium Aluminum Silicate)) — metamorphic

Jadeite (Jade)

NaAlSi2O6 (Sodium Aluminum Silicate)

Limonite (Iron Ore) (Hydrous Iron Oxide (goethite, lepidocrocite)) — Mineral

Limonite (Iron Ore)

Hydrous Iron Oxide (goethite, lepidocrocite)

BROWN GRANITE (likely 'Tan Brown' or similar) (Granite (specifically a variety rich in orthoclase feldspar, often with biotite and possibly hornblende)) — igneous

BROWN GRANITE (likely 'Tan Brown' or similar)

Granite (specifically a variety rich in orthoclase feldspar, often with biotite and possibly hornblende)

Chert (Jasper/Flint variant) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper/Flint variant)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Milky Quartz (Quartz (SiO2)) — Mineral

Milky Quartz

Quartz (SiO2)

Note: No specimen visible — N/A

Note: No specimen visible

Petrified Wood (Silicified wood (primarily Silicon Dioxide, SiO2)) — metamorphic

Petrified Wood

Silicified wood (primarily Silicon Dioxide, SiO2)

Coquina / Fossiliferous Limestone (Biogenic Limestone (Calcium Carbonate - CaCO3)) — sedimentary

Coquina / Fossiliferous Limestone

Biogenic Limestone (Calcium Carbonate - CaCO3)

Red Sandstone (Arenite (with Iron Oxide cement)) — sedimentary

Red Sandstone

Arenite (with Iron Oxide cement)

Coquina (Coquina (Bioclastic Limestone)) — sedimentary

Coquina

Coquina (Bioclastic Limestone)

Green Jasper (Silicon Dioxide (SiO2)) — sedimentary

Green Jasper

Silicon Dioxide (SiO2)

Quartzite River Pebble (Quartzite (primarily SiO2)) — metamorphic

Quartzite River Pebble

Quartzite (primarily SiO2)

Sandstone (Ferruginous) (Arenite (with Iron Oxide)) — sedimentary

Sandstone (Ferruginous)

Arenite (with Iron Oxide)

Granite (Granite (a plutonic igneous rock composed primarily of quartz, feldspar, and mica)) — igneous

Granite

Granite (a plutonic igneous rock composed primarily of quartz, feldspar, and mica)

Asphalt (Bituminous Concrete) (Bituminous mix / Anthropogenic conglomerate) — man-made composite (lithified equivalent of sedimentary)

Asphalt (Bituminous Concrete)

Bituminous mix / Anthropogenic conglomerate

man-made composite (lithified equivalent of sedimentary)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Quartz Vein in River Siltstone (Crystalline Quartz (SiO2) in Siliclastic Matrix) — sedimentary

Quartz Vein in River Siltstone

Crystalline Quartz (SiO2) in Siliclastic Matrix

Pumice or Scoria (Vesicular volcanic rock) — Igneous

Pumice or Scoria

Vesicular volcanic rock

Chert (Flint) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Flint)

Microcrystalline Quartz (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Sandstone Clast (Arenite (primarily SiO2)) — sedimentary

Sandstone Clast

Arenite (primarily SiO2)

Basalt (Vesicular) (Extrusive mafic igneous rock; primarily (Mg, Fe)2SiO4 (Olivine), CaAl2Si2O8 (Plagioclase Feldspar), and Pyroxene) — igneous

Basalt (Vesicular)

Extrusive mafic igneous rock; primarily (Mg, Fe)2SiO4 (Olivine), CaAl2Si2O8 (Plagioclase Feldspar), and Pyroxene

River Siltstone / Mudstone Pebble (Siltstone (composed of mixed silicate and carbonate minerals)) — sedimentary

River Siltstone / Mudstone Pebble

Siltstone (composed of mixed silicate and carbonate minerals)

Petrified Wood (Silicified wood (Quartz/Chalcedony replacement of organic matter)) — sedimentary

Petrified Wood

Silicified wood (Quartz/Chalcedony replacement of organic matter)

Flint / Chert (Silicon dioxide (SiO2)) — sedimentary

Flint / Chert

Silicon dioxide (SiO2)

Banded Chert (Silicon Dioxide (SiO2)) — sedimentary

Banded Chert

Silicon Dioxide (SiO2)

Quartz (possibly milky quartz) (Quartz (Silica; SiO₂)) — Mineral

Quartz (possibly milky quartz)

Quartz (Silica; SiO₂)

Diamond (or Diamond Simulant like Cubic Zirconia) (Carbon (C) - if Diamond; Zirconium dioxide (ZrO2) - if Cubic Zirconia) — mineral

Diamond (or Diamond Simulant like Cubic Zirconia)

Carbon (C) - if Diamond; Zirconium dioxide (ZrO2) - if Cubic Zirconia

Beryl (Variety Mix) (Be3Al2(Si6O18)) — Mineral

Beryl (Variety Mix)

Be3Al2(Si6O18)

Slate (Slate (Foliated metamorphic rock)) — metamorphic

Slate

Slate (Foliated metamorphic rock)

Sandstone (Quartzose Sandstone) (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone (Quartzose Sandstone)

Clastic sedimentary rock (primarily SiO2)

Sandstone (with Iron Staining) (Clastic sedimentary rock (primarily Quartz with Limonite/Goethite staining)) — sedimentary

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily Quartz with Limonite/Goethite staining)

Ferruginous Sandstone (Ironstone Conglomerate fragments) (Ferruginous clastic sedimentary rock (SiO2 cemented by Fe2O3)) — sedimentary

Ferruginous Sandstone (Ironstone Conglomerate fragments)

Ferruginous clastic sedimentary rock (SiO2 cemented by Fe2O3)

Zebra Jasper (Tetragonal Silicon Dioxide (Quartz) with impurities) — sedimentary

Zebra Jasper

Tetragonal Silicon Dioxide (Quartz) with impurities

Scoria (Vesicular Basaltic Glass) — igneous

Scoria

Vesicular Basaltic Glass

Peridot (Olivine ((Mg,Fe)2SiO4)) — Mineral

Peridot

Olivine ((Mg,Fe)2SiO4)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

N/A - Image is non-geological (Acrylonitrile Butadiene Styrene (ABS) or Polypropylene (PP)) — Synthetic material (Plastic/Polymer)

N/A - Image is non-geological

Acrylonitrile Butadiene Styrene (ABS) or Polypropylene (PP)

Synthetic material (Plastic/Polymer)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Chert (Yellow Jasper variant) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Yellow Jasper variant)

Microcrystalline Quartz (SiO2)