Rock Identifier

Category

Man Made Object (Metalwork)

Browse man made object (metalwork) specimens identified by the Rock Identifier community.

Learn about Man Made Object (Metalwork) in the encyclopedia

Opalite

Map Jasper

Goldstone

Blue Goldstone

Mandarin Garnet

Mandarin Garnet

Andalusite

Zincite

Marl

Coquina

Dunite

Dalmatian Jasper

Dalmatian Jasper

Rock Gypsum

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Botryoidal Agate (Chalcedony (Silicon Dioxide, SiO2)) — mineral

Botryoidal Agate

Chalcedony (Silicon Dioxide, SiO2)

Likely petrified wood (Silicified wood, chiefly microcrystalline quartz (SiO₂)) — fossil

Likely petrified wood

Silicified wood, chiefly microcrystalline quartz (SiO₂)

Fossil brachiopod or bivalve shell (Likely a fossilized brachiopod; precise genus cannot be determined from the photograph) — fossil

Fossil brachiopod or bivalve shell

Likely a fossilized brachiopod; precise genus cannot be determined from the photograph

Amber (Copal) (Succinate (Fossilized Resin)) — mineraloid

Amber (Copal)

Succinate (Fossilized Resin)

Blue Celestite (Strontium Sulfate (SrSO4)) — mineral

Blue Celestite

Strontium Sulfate (SrSO4)

Weathered fossiliferous limestone pebble (Calcitic limestone, predominantly CaCO₃ (likely containing fossil or bioclast fragments)) — sedimentary

Weathered fossiliferous limestone pebble

Calcitic limestone, predominantly CaCO₃ (likely containing fossil or bioclast fragments)

Colorless faceted gemstone, likely cubic zirconia (Cubic zirconia (synthetic ZrO₂), possibly glass or white sapphire) — gemstone

Colorless faceted gemstone, likely cubic zirconia

Cubic zirconia (synthetic ZrO₂), possibly glass or white sapphire

Basalt (Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)) — igneous

Basalt

Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)

Granite (Granite (a common term for a felsic intrusive igneous rock)) — igneous

Granite

Granite (a common term for a felsic intrusive igneous rock)

Black Obsidian (Volcanic Glass (predominantly SiO2)) — igneous

Black Obsidian

Volcanic Glass (predominantly SiO2)

Shale (Shale (Fine-grained clastic sedimentary rock)) — sedimentary

Shale

Shale (Fine-grained clastic sedimentary rock)

Smoky quartz (likely) (Quartz, silicon dioxide (SiO₂), naturally irradiated variety) — mineral

Smoky quartz (likely)

Quartz, silicon dioxide (SiO₂), naturally irradiated variety

Quartz (Quartz (SiO₂ - Silicon Dioxide)) — Mineral

Quartz

Quartz (SiO₂ - Silicon Dioxide)

Quartz (Silicon Dioxide (SiO₂)) — Mineral

Quartz

Silicon Dioxide (SiO₂)

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

Red Jasper

Silicon Dioxide (SiO2) with hematite inclusions

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Scoria (Scoria (vesicular basalt-andesite)) — igneous

Scoria

Scoria (vesicular basalt-andesite)

Basalt with Weathering Crust (Extrusive mafic volcanic rock) — igneous

Basalt with Weathering Crust

Extrusive mafic volcanic rock

Polished banded agate (likely sardonyx) (Cryptocrystalline chalcedony, SiO₂; reddish bands are iron-stained layers) — mineral

Polished banded agate (likely sardonyx)

Cryptocrystalline chalcedony, SiO₂; reddish bands are iron-stained layers

Granite (Pebble) (Granite (Plutonic Igneous Rock)) — igneous

Granite (Pebble)

Granite (Plutonic Igneous Rock)

Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)

Granite (Granite (Alkali feldspar, Plagioclase feldspar, and Quartz)) — igneous

Granite

Granite (Alkali feldspar, Plagioclase feldspar, and Quartz)

River Rock (Quartzite/Chert conglomerate) (Quartzite (SiO2)) — metamorphic

River Rock (Quartzite/Chert conglomerate)

Quartzite (SiO2)

Garnet (Garnet group (X3Y2(SiO4)3)) — mineral

Garnet

Garnet group (X3Y2(SiO4)3)

Apache Tear (Obsidian) (Obsidian / Amorphous Volcanic Glass (primarily SiO2)) — igneous

Apache Tear (Obsidian)

Obsidian / Amorphous Volcanic Glass (primarily SiO2)

Iron-rich chert or jasper fragment (Microcrystalline quartz (SiO₂), commonly hematite/goethite-bearing) — sedimentary

Iron-rich chert or jasper fragment

Microcrystalline quartz (SiO₂), commonly hematite/goethite-bearing

Iron-rich sandstone or laterite (Ferruginous sandstone; mainly quartz (SiO₂) cemented or stained by iron oxides such as hematite (Fe₂O₃) and goethite (FeO(OH))) — sedimentary

Iron-rich sandstone or laterite

Ferruginous sandstone; mainly quartz (SiO₂) cemented or stained by iron oxides such as hematite (Fe₂O₃) and goethite (FeO(OH))

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Black Onyx (Silicon Dioxide (SiO2)) — mineral

Black Onyx

Silicon Dioxide (SiO2)

Chert (Chalcedony) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (Chalcedony)

Microcrystalline quartz (SiO2)

Citrine (Silicon Dioxide (SiO2) with iron impurities) — Mineral

Citrine

Silicon Dioxide (SiO2) with iron impurities

Diorite (Diorite (Intermediate intrusive igneous rock)) — igneous

Diorite

Diorite (Intermediate intrusive igneous rock)

Banded Chert (Agate-like Flint) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Banded Chert (Agate-like Flint)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Chert (specifically Flint) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (specifically Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Tumbled agate (probable moss or dendritic agate) (Microcrystalline quartz, SiO₂, with iron/manganese dendritic inclusions) — mineral

Tumbled agate (probable moss or dendritic agate)

Microcrystalline quartz, SiO₂, with iron/manganese dendritic inclusions

Granite (Intrusive igneous rock composed mostly of quartz, alkali feldspar, and plagioclase) — igneous

Granite

Intrusive igneous rock composed mostly of quartz, alkali feldspar, and plagioclase

Granite (Intrusive Igneous Rock) — igneous

Granite

Intrusive Igneous Rock

Granite (Felsic intrusive igneous rock) — igneous

Granite

Felsic intrusive igneous rock