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

Yellow Sapphire (Raw) (Corundum (Al2O3)) — mineral

Yellow Sapphire (Raw)

Corundum (Al2O3)

Chalk (Calcium Carbonate (CaCO3)) — sedimentary

Chalk

Calcium Carbonate (CaCO3)

Flint (chert) (Microcrystalline quartz (SiO₂), a variety of chert) — sedimentary

Flint (chert)

Microcrystalline quartz (SiO₂), a variety of chert

Flint (chert) (Microcrystalline quartz (SiO₂), commonly called chert or flint) — sedimentary

Flint (chert)

Microcrystalline quartz (SiO₂), commonly called chert or flint

Diamond (or Cubic Zirconia simulant) (Carbon (C) - Diamond / Zirconium dioxide (ZrO2) - CZ) — mineral

Diamond (or Cubic Zirconia simulant)

Carbon (C) - Diamond / Zirconium dioxide (ZrO2) - CZ

Moissanite (Silicon Carbide (SiC)) — mineral

Moissanite

Silicon Carbide (SiC)

Diamond (Carbon (C)) — mineral

Diamond

Carbon (C)

Clear-stone silver-tone teardrop earring (The stones may be colorless quartz or glass; the image does not allow reliable identification. Metal setting appears silver-tone.) — gemstone

Clear-stone silver-tone teardrop earring

The stones may be colorless quartz or glass; the image does not allow reliable identification. Metal setting appears silver-tone.

Diamond (Carbon (C)) — gemstone

Diamond

Carbon (C)

Diamond (Carbon (C)) — gemstone

Diamond

Carbon (C)

Diamond (Carbon (C)) — mineral

Diamond

Carbon (C)

Rough Corundum (Sapphire/Ruby mixture) (Corundum (Aluminum Oxide, Al2O3)) — mineral

Rough Corundum (Sapphire/Ruby mixture)

Corundum (Aluminum Oxide, Al2O3)

Diamond (Colorless/White) (Carbon (C)) — mineral

Diamond (Colorless/White)

Carbon (C)

Belemnite Fossil (Belemnitida (rostrum)) — fossil

Belemnite Fossil

Belemnitida (rostrum)

Native American Pottery Sherd — artifact

Native American Pottery Sherd

Chert (flint), likely a weathered nodule fragment (Microcrystalline quartz (SiO₂), commonly termed chert or flint) — sedimentary

Chert (flint), likely a weathered nodule fragment

Microcrystalline quartz (SiO₂), commonly termed chert or flint

Chert (likely flint) (Microcrystalline quartz, SiO₂) — sedimentary

Chert (likely flint)

Microcrystalline quartz, SiO₂

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

Diamond (Carbon (C)) — gemstone

Diamond

Carbon (C)

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

Diamond (Carbon (C)) — mineral

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)

Chintz (Microcrystalline Quartz (SiO2)) — sedimentary

Chintz

Microcrystalline Quartz (SiO2)

Small water-worn pebble, likely granite or granitic rock (Granite (tentative; exact identification is uncertain from the photo)) — igneous

Small water-worn pebble, likely granite or granitic rock

Granite (tentative; exact identification is uncertain from the photo)

Gabbro (Gabbro) — igneous

Gabbro

Gabbro

Fossil Shark Tooth (Lamniform (Mackerel Shark) fossil tooth, likely Otodus or Cretalamna) — fossil

Fossil Shark Tooth

Lamniform (Mackerel Shark) fossil tooth, likely Otodus or Cretalamna

Blue Chalcedony Cube (Silicon Dioxide (SiO2)) — mineral

Blue Chalcedony Cube

Silicon Dioxide (SiO2)

Carnelian (SiO2 (variety of chalcedony)) — gemstone

Carnelian

SiO2 (variety of chalcedony)

Brown chert (flint) (Microcrystalline quartz (SiO₂), commonly called chert; “flint” is a dark variety) — sedimentary

Brown chert (flint)

Microcrystalline quartz (SiO₂), commonly called chert; “flint” is a dark variety

Chert (likely flint) (Microcrystalline quartz, SiO₂) — sedimentary

Chert (likely flint)

Microcrystalline quartz, SiO₂

Diamond (Native Carbon (C)) — mineral

Diamond

Native Carbon (C)

Small rounded pebble (rock type indeterminate) (Unidentified fine-grained lithic pebble) — sedimentary

Small rounded pebble (rock type indeterminate)

Unidentified fine-grained lithic pebble

Corundum (Ruby variety) (Aluminium oxide (Al2O3)) — mineral

Corundum (Ruby variety)

Aluminium oxide (Al2O3)

Diamond (as set in a gold ring) (Carbon (C)) — mineral

Diamond (as set in a gold ring)

Carbon (C)

Turquoise (Hydrated phosphate of copper and aluminum, CuAl6(PO4)4(OH)8·4H2O) — mineral

Turquoise

Hydrated phosphate of copper and aluminum, CuAl6(PO4)4(OH)8·4H2O

Flint (chert) fragment (Microcrystalline quartz (SiO₂), commonly called flint when dark) — sedimentary

Flint (chert) fragment

Microcrystalline quartz (SiO₂), commonly called flint when dark

Chert (flint), brown variety (Microcrystalline quartz (SiO₂)) — sedimentary

Chert (flint), brown variety

Microcrystalline quartz (SiO₂)

Likely flint (chert) fragment (Chert, microcrystalline quartz (SiO₂)) — sedimentary

Likely flint (chert) fragment

Chert, microcrystalline quartz (SiO₂)

Synthetic Faux Fur Fursuit (Polyacrylonitrile / Polyester (Synthetic Textile)) — not a rock (synthetic material/costume)

Synthetic Faux Fur Fursuit

Polyacrylonitrile / Polyester (Synthetic Textile)

not a rock (synthetic material/costume)

Tiger Shark Fossil Tooth (Galeocerdo cuvier (fossilized)) — sedimentary

Tiger Shark Fossil Tooth

Galeocerdo cuvier (fossilized)

Tumbled carnelian (Carnelian, a red-orange variety of chalcedony (microcrystalline quartz, SiO₂)) — gemstone

Tumbled carnelian

Carnelian, a red-orange variety of chalcedony (microcrystalline quartz, SiO₂)