Rock Identifier

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

Asphalt Rock

Rock Gypsum

Talc-carbonate Rock

Talc-carbonate Rock

Opalite

Chalk

Goldstone

Anorthosite

Albitite

Gondite

Dunite

Limestone

Coquina

Wood Paneling (Engineered Wood / Plywood Paneling) — not a rock

Wood Paneling

Engineered Wood / Plywood Paneling

Sea Glass (White/Clear) (Amorphous Silica (Alkali-Lime-Silica Glass), SiO2 + Na2O + CaO) — Anthropogenic (Man-made product subject to geological processes)

Sea Glass (White/Clear)

Amorphous Silica (Alkali-Lime-Silica Glass), SiO2 + Na2O + CaO

Anthropogenic (Man-made product subject to geological processes)

Opal (in Jewelry Setting) (Hydrated Silicon Dioxide (SiO2·nH2O)) — gemstone

Opal (in Jewelry Setting)

Hydrated Silicon Dioxide (SiO2·nH2O)

Quartz crystal (likely clear quartz) (Quartz, silicon dioxide (SiO₂)) — mineral

Quartz crystal (likely clear quartz)

Quartz, silicon dioxide (SiO₂)

Polished black stone, likely black obsidian (Obsidian (volcanic glass), chiefly silica-rich rhyolitic composition) — igneous

Polished black stone, likely black obsidian

Obsidian (volcanic glass), chiefly silica-rich rhyolitic composition

Pyrite Concretion (Grapestone) (Iron Sulfide (FeS2) Concretion) — sedimentary

Pyrite Concretion (Grapestone)

Iron Sulfide (FeS2) Concretion

Chert / River Pebble (Microcrystalline Quartz (SiO2)) — sedimentary

Chert / River Pebble

Microcrystalline Quartz (SiO2)

Slag Glass (SiO2 (Silicon Dioxide) with impurities) — man-made glass

Slag Glass

SiO2 (Silicon Dioxide) with impurities

Tumbled gray stone, likely quartz-rich pebble (Probable microcrystalline quartz/chalcedony (SiO₂), possibly gray jasper or quartzite) — mineral

Tumbled gray stone, likely quartz-rich pebble

Probable microcrystalline quartz/chalcedony (SiO₂), possibly gray jasper or quartzite

Aura Quartz / Rainbow Aura Quartz (Silicon Dioxide (SiO2) with metallic vapor coating) — mineral

Aura Quartz / Rainbow Aura Quartz

Silicon Dioxide (SiO2) with metallic vapor coating

Green aventurine bead bracelet (Quartz (SiO₂), typically green quartzite/aventurine colored by fuchsite mica or other inclusions) — mineral

Green aventurine bead bracelet

Quartz (SiO₂), typically green quartzite/aventurine colored by fuchsite mica or other inclusions

Unidentified polished mineral fragment (Likely quartz-bearing stone; exact identification is impossible from the blurred photograph) — mineral

Unidentified polished mineral fragment

Likely quartz-bearing stone; exact identification is impossible from the blurred photograph

Coquina (Biogenic Limestone (CaCO3)) — sedimentary

Coquina

Biogenic Limestone (CaCO3)

Green Agate (Silicon dioxide (SiO₂)) — mineral

Green Agate

Silicon dioxide (SiO₂)

Black Obsidian (Amorphous volcanic glass (SiO2 + impurities)) — igneous

Black Obsidian

Amorphous volcanic glass (SiO2 + impurities)

Small dark rock fragment (Uncertain; possibly weathered basalt or slag) — mineral

Small dark rock fragment

Uncertain; possibly weathered basalt or slag

Blue Goldstone (Synthetic glass with copper or cobalt/manganese inclusions) — man-made glass

Blue Goldstone

Synthetic glass with copper or cobalt/manganese inclusions

Graphite (Graphite (Native Carbon, C)) — metamorphic

Graphite

Graphite (Native Carbon, C)

Faceted brown gemstone pendant, likely smoky quartz or champagne topaz (Probably quartz (SiO₂), smoky variety; alternatively topaz (Al₂SiO₄(F,OH)₂)) — gemstone

Faceted brown gemstone pendant, likely smoky quartz or champagne topaz

Probably quartz (SiO₂), smoky variety; alternatively topaz (Al₂SiO₄(F,OH)₂)

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

Tumbled amber-colored chalcedony or jasper

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

Blue Slag Glass (Amorphous Silica (Byproduct of smelting)) — Antropogenic (Man-made)

Blue Slag Glass

Amorphous Silica (Byproduct of smelting)

Antropogenic (Man-made)

Feldspar-Quartz Rock (likely Pegmatite or Granite) (Feldspar-Quartz composite rock (KAlSi3O8 - SiO2)) — igneous

Feldspar-Quartz Rock (likely Pegmatite or Granite)

Feldspar-Quartz composite rock (KAlSi3O8 - SiO2)

Goldstone (likely blue-free synthetic goldstone pendant) (Synthetic aventurine glass; silica glass with dispersed metallic copper crystals) — mineral

Goldstone (likely blue-free synthetic goldstone pendant)

Synthetic aventurine glass; silica glass with dispersed metallic copper crystals

Yooperlite (Syenite clast containing fluorescent Sodalite) (Sodalite-bearing Syenite) — igneous

Yooperlite (Syenite clast containing fluorescent Sodalite)

Sodalite-bearing Syenite

Slag (Ferrous Slag (Siliceous industrial waste)) — Anthropogenic (Man-made industrial byproduct)

Slag

Ferrous Slag (Siliceous industrial waste)

Anthropogenic (Man-made industrial byproduct)

Polished white calcite sphere (identification tentative) (Calcite, CaCO₃) — mineral

Polished white calcite sphere (identification tentative)

Calcite, CaCO₃

Diamond (Carbon (C)) — gemstone

Diamond

Carbon (C)

Corundum (Pink Sapphire / Ruby) (Al2O3 (Aluminum Oxide)) — mineral

Corundum (Pink Sapphire / Ruby)

Al2O3 (Aluminum Oxide)

Diamond (in a jewelry setting) (Carbon (C)) — mineral

Diamond (in a jewelry setting)

Carbon (C)

Iron Slag (Iron/Steel Slag (Ferrosilicate Glass)) — industrial byproduct (anthropogenic material)

Iron Slag

Iron/Steel Slag (Ferrosilicate Glass)

industrial byproduct (anthropogenic material)

Smoky Quartz (Silicon Dioxide (SiO2) with aluminum impurities) — mineral

Smoky Quartz

Silicon Dioxide (SiO2) with aluminum impurities

Green Slag Glass (Cullet (Amorphous Silicon Dioxide with impurities)) — Man-made rock-like material

Green Slag Glass

Cullet (Amorphous Silicon Dioxide with impurities)

Man-made rock-like material

Chert (Chalcedony/Agate) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Chalcedony/Agate)

Microcrystalline Quartz (SiO2)

Botryoidal chalcedony (likely agate/jasper variety) (Microcrystalline quartz, SiO₂) — mineral

Botryoidal chalcedony (likely agate/jasper variety)

Microcrystalline quartz, SiO₂

Unakite (Unakite (Epidotized Granite)) — metamorphic

Unakite

Unakite (Epidotized Granite)

Red cabochon gemstone, likely carnelian or red agate (Cryptocrystalline quartz (chalcedony), SiO₂) — gemstone

Red cabochon gemstone, likely carnelian or red agate

Cryptocrystalline quartz (chalcedony), SiO₂

Dyed Blue Agate Slice (Silicon Dioxide (SiO2)) — mineral

Dyed Blue Agate Slice

Silicon Dioxide (SiO2)

Sandstone (specifically Arkose or Quartz Arenite) (Arenite (primarily SiO2 with possible Feldspar)) — sedimentary

Sandstone (specifically Arkose or Quartz Arenite)

Arenite (primarily SiO2 with possible Feldspar)

Possible ironstone concretion or weathered mineral nodule (Iron-oxide-rich concretion, likely goethite/limonite; identification uncertain from the photo) — sedimentary

Possible ironstone concretion or weathered mineral nodule

Iron-oxide-rich concretion, likely goethite/limonite; identification uncertain from the photo

Jasper and Chalcedony Composite (Silicon Dioxide (SiO2) microcrystalline quartz) — sedimentary

Jasper and Chalcedony Composite

Silicon Dioxide (SiO2) microcrystalline quartz

Gemstone jewelry ensemble (Likely mixed gemstone and glass-bead jewelry; exact stones cannot be determined from the image) — gemstone

Gemstone jewelry ensemble

Likely mixed gemstone and glass-bead jewelry; exact stones cannot be determined from the image

Dyed Quartz Cube (Silicon Dioxide (SiO2)) — mineral

Dyed Quartz Cube

Silicon Dioxide (SiO2)