Rock Identifier

Category

Man Made

Browse man made specimens identified by the Rock Identifier community.

Learn about Man Made in the encyclopedia

Opalite

Goldstone

Blue Goldstone

Zincite

Map Jasper

Mandarin Garnet

Mandarin Garnet

Andalusite

Marl

Coquina

Dunite

Dalmatian Jasper

Dalmatian Jasper

Rock Gypsum

Exposed Aggregate Concrete (Pea Gravel) (Concrete with Siliceous Alluvial Gravels) — sedimentary (man-made conglomerate)

Exposed Aggregate Concrete (Pea Gravel)

Concrete with Siliceous Alluvial Gravels

sedimentary (man-made conglomerate)

Man-made Jewelry (Metal and Glass/Plastic) (Synthetic Alloy and Amorphous Solid (SiO2/Polymer)) — not a rock

Man-made Jewelry (Metal and Glass/Plastic)

Synthetic Alloy and Amorphous Solid (SiO2/Polymer)

Tumbled milky quartz pebble (Quartz (silicon dioxide, SiO₂)) — mineral

Tumbled milky quartz pebble

Quartz (silicon dioxide, SiO₂)

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

Black Obsidian

Amorphous volcanic glass (SiO2 + impurities)

Green glassy mineral fragment, possibly fluorite (Fluorite (calcium fluoride, CaF₂), tentative identification) — mineral

Green glassy mineral fragment, possibly fluorite

Fluorite (calcium fluoride, CaF₂), tentative identification

Blue obsidian-like volcanic glass (Volcanic glass, chiefly silica-rich amorphous material (composition uncertain)) — igneous

Blue obsidian-like volcanic glass

Volcanic glass, chiefly silica-rich amorphous material (composition uncertain)

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

Milky quartz (likely quartz crystal fragment)

Quartz, silicon dioxide (SiO₂)

Likely iron-rich slag or weathered ironstone fragment (Uncertain; possibly iron oxide–rich material (hematite/goethite) or industrial iron slag) — mineral

Likely iron-rich slag or weathered ironstone fragment

Uncertain; possibly iron oxide–rich material (hematite/goethite) or industrial iron slag

Blue-green faceted gemstone, possibly glass or synthetic material (Not identifiable from the image; possible synthetic spinel or glass) — gemstone

Blue-green faceted gemstone, possibly glass or synthetic material

Not identifiable from the image; possible synthetic spinel or glass

Asphalt (Road Aggregate) (Bituminous conglomerate) — sedimentary

Asphalt (Road Aggregate)

Bituminous conglomerate

Opalite (Synthetic Glass (Simulated Opal)) — gemstone

Opalite

Synthetic Glass (Simulated Opal)

Opalite (Synthetic Glass (Simulated Opal)) — gemstone

Opalite

Synthetic Glass (Simulated Opal)

Asphalt / Road Aggregate (Bituminous Conglomerate (synthetic)) — sedimentary

Asphalt / Road Aggregate

Bituminous Conglomerate (synthetic)

Synthetic Resin / Plastic Figurine (Synthetic Polymer (Copolymer of Polyethylene or Resin)) — Mineraloid-like Synthetic Material

Synthetic Resin / Plastic Figurine

Synthetic Polymer (Copolymer of Polyethylene or Resin)

Mineraloid-like Synthetic Material

Asphalt (Road Aggregate) (Asphalt concrete / Bituminous mixture) — anthropogenic sedimentary (technolith)

Asphalt (Road Aggregate)

Asphalt concrete / Bituminous mixture

anthropogenic sedimentary (technolith)

Cullet Glass (Slag Glass) (Amorphous Silicon Dioxide (Industrial Byproduct)) — mineraloid

Cullet Glass (Slag Glass)

Amorphous Silicon Dioxide (Industrial Byproduct)

Aura Quartz (Titanium or Gold bonded Silicon Dioxide (SiO2)) — mineral

Aura Quartz

Titanium or Gold bonded Silicon Dioxide (SiO2)

Bouncy Ball (Synthetic Rubber Polymer) (Polybutadiene / Ethylene Vinyl Acetate (EVA)) — Synthetic material (Not a rock or mineral)

Bouncy Ball (Synthetic Rubber Polymer)

Polybutadiene / Ethylene Vinyl Acetate (EVA)

Synthetic material (Not a rock or mineral)

Polished black pebble, possibly obsidian (Volcanic glass (obsidian), likely; identification is tentative from the image) — igneous

Polished black pebble, possibly obsidian

Volcanic glass (obsidian), likely; identification is tentative from the image

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

Botryoidal chalcedony (likely agate/jasper variety)

Microcrystalline quartz, SiO₂

Polished silver sheen obsidian heart (Obsidian (volcanic glass), primarily rhyolitic silica-rich glass) — igneous

Polished silver sheen obsidian heart

Obsidian (volcanic glass), primarily rhyolitic silica-rich glass

Mystic Topaz (Treated Quartz or Topaz) (Aluminum silicate fluoride hydroxide [Al2SiO4(F,OH)2] with thin-film metallic coating) — gemstone

Mystic Topaz (Treated Quartz or Topaz)

Aluminum silicate fluoride hydroxide [Al2SiO4(F,OH)2] with thin-film metallic coating

Sandstone Concretion (Limonitic Sandstone Concretion) — sedimentary

Sandstone Concretion

Limonitic Sandstone Concretion

Sea Glass (Amorphous silicon dioxide (Man-made glass weathered by wave action)) — sedimentary

Sea Glass

Amorphous silicon dioxide (Man-made glass weathered by wave action)

Opalite (Synthetic Glass (Silica-based)) — gemstone

Opalite

Synthetic Glass (Silica-based)

Costume Jewelry with Synthetic Gemstones (Synthetic Cubic Zirconia and Glass (SiO2 / ZrO2)) — mineral

Costume Jewelry with Synthetic Gemstones

Synthetic Cubic Zirconia and Glass (SiO2 / ZrO2)

Aggregate Concrete (Anthropogenic Conglomerate (Technosol)) — sedimentary

Aggregate Concrete

Anthropogenic Conglomerate (Technosol)

Asphalt Concrete (Bituminous Concrete) — sedimentary (artificial)

Asphalt Concrete

Bituminous Concrete

sedimentary (artificial)

Opaline Glass (Opalite) (Synthetic Silicon Dioxide Glass) — Mineraloid (Man-made)

Opaline Glass (Opalite)

Synthetic Silicon Dioxide Glass

Mineraloid (Man-made)

Titanium Aura Quartz (Titanium bonded Silicon Dioxide (SiO2 + Ti)) — mineral

Titanium Aura Quartz

Titanium bonded Silicon Dioxide (SiO2 + Ti)

Iron-rich slag or ironstone; appearance is not diagnostic (Likely iron-oxide-rich material (hematite, Fe₂O₃, and/or magnetite, Fe₃O₄); possibly smelting slag) — mineral

Iron-rich slag or ironstone; appearance is not diagnostic

Likely iron-oxide-rich material (hematite, Fe₂O₃, and/or magnetite, Fe₃O₄); possibly smelting slag

Opalite Egg (Synthetic Glass (Simulated Opal)) — mineral

Opalite Egg

Synthetic Glass (Simulated Opal)

Rainbow Hematite Ring (Iron(III) oxide (Fe2O3) with thin-film coating) — mineral

Rainbow Hematite Ring

Iron(III) oxide (Fe2O3) with thin-film coating

Polymer Clay (Mock Mineral) (Polyvinyl chloride (PVC) with plasticizers and pigment) — Synthetic material (Not a natural rock/mineral)

Polymer Clay (Mock Mineral)

Polyvinyl chloride (PVC) with plasticizers and pigment

Synthetic material (Not a natural rock/mineral)

Concrete with Aggregate (Artificial Conglomerate (Cement and Aggregate)) — sedimentary

Concrete with Aggregate

Artificial Conglomerate (Cement and Aggregate)

Opalite (Opalescent Glass (SiO2 + coloring agents)) — Mineral (Synthetic/Man-made)

Opalite

Opalescent Glass (SiO2 + coloring agents)

Mineral (Synthetic/Man-made)

Carved opalite pendant (Opalite (man-made opalescent glass; not a natural mineral)) — gemstone

Carved opalite pendant

Opalite (man-made opalescent glass; not a natural mineral)

Clear quartz fragment (rock crystal) (Quartz, silicon dioxide (SiO₂)) — mineral

Clear quartz fragment (rock crystal)

Quartz, silicon dioxide (SiO₂)

Milky quartz (rough fragment) (Quartz, silicon dioxide (SiO₂)) — mineral

Milky quartz (rough fragment)

Quartz, silicon dioxide (SiO₂)

Rock crystal (clear quartz), possibly cloudy quartz (Quartz, silicon dioxide (SiO₂)) — mineral

Rock crystal (clear quartz), possibly cloudy quartz

Quartz, silicon dioxide (SiO₂)

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

Hematite

Iron(III) oxide (Fe2O3)

Sea Glass (Man-made silicate glass (Amorphous silicon dioxide)) — sedimentary

Sea Glass

Man-made silicate glass (Amorphous silicon dioxide)