Rock Identifier

Category

Artifact

Browse artifact specimens identified by the Rock Identifier community.

Rounded weathered pebble (Likely fine-grained sandstone, siltstone, or weathered volcanic rock; exact identification is uncertain from the image) — sedimentary

Rounded weathered pebble

Likely fine-grained sandstone, siltstone, or weathered volcanic rock; exact identification is uncertain from the image

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Chert (possibly a worked stone flake) (Microcrystalline quartz, SiO₂) — sedimentary

Chert (possibly a worked stone flake)

Microcrystalline quartz, SiO₂

Bronze or iron-age decorated pottery sherd (Archaeological ceramic fragment; likely fired clay with impressed or molded decoration, not a natural rock) — fossil

Bronze or iron-age decorated pottery sherd

Archaeological ceramic fragment; likely fired clay with impressed or molded decoration, not a natural rock

Likely gray chert (flint) pebble (Microcrystalline quartz (SiO₂), commonly called chert or flint) — sedimentary

Likely gray chert (flint) pebble

Microcrystalline quartz (SiO₂), commonly called chert or flint

Chert (Flint) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Flint)

Silicon Dioxide (SiO2)

Chert Pebble (Microcrystalline Quartz (SiO2)) — sedimentary

Chert Pebble

Microcrystalline Quartz (SiO2)

Chert (Microcrystalline or cryptocrystalline quartz (SiO2)) — sedimentary

Chert

Microcrystalline or cryptocrystalline quartz (SiO2)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

Chert (Likely Jasper) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Likely Jasper)

Microcrystalline Quartz (SiO2)

Chert (Cream Variety) (Microcrystalline silica (SiO2)) — sedimentary

Chert (Cream Variety)

Microcrystalline silica (SiO2)

Chert (often called Flint in dark varieties) (Microcrystalline or cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (often called Flint in dark varieties)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Chert (Jasper/Chalcedony) (Microcrystalline Silica (SiO2)) — sedimentary

Chert (Jasper/Chalcedony)

Microcrystalline Silica (SiO2)

Chert Pebble (Chert (Microcrystalline Quartz, SiO2)) — sedimentary

Chert Pebble

Chert (Microcrystalline Quartz, SiO2)

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

Chert (Flint/Jasper variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert / Flint Pebble (Chert (SiO2)) — sedimentary

Chert / Flint Pebble

Chert (SiO2)

Chert (or Chalcedony) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (or Chalcedony)

Microcrystalline Quartz (SiO2)

Chert (Arrowhead Artifact) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Arrowhead Artifact)

Microcrystalline Quartz (SiO2)

Chert (Flint) Artifact (Silicon Dioxide (SiO2)) — sedimentary

Chert (Flint) Artifact

Silicon Dioxide (SiO2)

Obsidian Arrowhead (Obsidian (volcanic glass, SiO2 rich)) — igneous

Obsidian Arrowhead

Obsidian (volcanic glass, SiO2 rich)

Man-made Ceramic / Clay Figurine (Aluminosilicate Ceramic (Processed Clay)) — Synthetic (not a rock or mineral)

Man-made Ceramic / Clay Figurine

Aluminosilicate Ceramic (Processed Clay)

Synthetic (not a rock or mineral)

Dyed Pink Dragon Vein Agate (Silicon Dioxide (SiO2) with artificial dye additives) — mineral

Dyed Pink Dragon Vein Agate

Silicon Dioxide (SiO2) with artificial dye additives

Obsidian (Obsidian (Volcanic Glass)) — igneous

Obsidian

Obsidian (Volcanic Glass)

Mahogany Obsidian (Volcanic Glass (Amorphous Silicon Dioxide with Hematite inclusions)) — igneous

Mahogany Obsidian

Volcanic Glass (Amorphous Silicon Dioxide with Hematite inclusions)

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

Chert (Flint Arrowhead)

Microcrystalline Quartz (SiO2)

Flint (Microcrystalline Quartz (SiO2)) — sedimentary

Flint

Microcrystalline Quartz (SiO2)

Chert (Silicon dioxide (SiO2)) — sedimentary

Chert

Silicon dioxide (SiO2)

Chert (Flint Nodule) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (Flint Nodule)

Microcrystalline quartz (SiO2)

Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

Chert (Nodule) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Chert (Nodule)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

Chert (Jasper variation) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Jasper variation)

Silicon Dioxide (SiO2)

Chert (Iron-Stained) (Microcrystalline Silica (SiO2)) — sedimentary

Chert (Iron-Stained)

Microcrystalline Silica (SiO2)

Chert (specifically Flint or Common Chert) (Silicon Dioxide (SiO2)) — sedimentary

Chert (specifically Flint or Common Chert)

Silicon Dioxide (SiO2)

Chert (Green variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Green variety)

Microcrystalline Quartz (SiO2)

Chert Arrowhead (Microcrystalline quartz (SiO2)) — sedimentary

Chert Arrowhead

Microcrystalline quartz (SiO2)

Chert (Arrowhead Fragment) (Cryptocrystalline quartz (SiO2)) — sedimentary

Chert (Arrowhead Fragment)

Cryptocrystalline quartz (SiO2)

Chert / Flint (or lithic artifact flake) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert / Flint (or lithic artifact flake)

Microcrystalline Quartz (SiO2)

Carved limestone architectural fragment (Limestone, predominantly calcite (CaCO₃), possibly weathered fossiliferous or oolitic limestone) — sedimentary

Carved limestone architectural fragment

Limestone, predominantly calcite (CaCO₃), possibly weathered fossiliferous or oolitic limestone

Obsidian Arrowhead Replica (or similar knapped stone) (Obsidian (volcanic glass) or Chert) — igneous

Obsidian Arrowhead Replica (or similar knapped stone)

Obsidian (volcanic glass) or Chert

Chert Arrowhead (Chert (Cryptocrystalline variety of Quartz, SiO2)) — sedimentary

Chert Arrowhead

Chert (Cryptocrystalline variety of Quartz, SiO2)

Chert Arrowhead (Lithic Tool) (Microcrystalline quartz (SiO2) - Archeological lithic artifact) — sedimentary

Chert Arrowhead (Lithic Tool)

Microcrystalline quartz (SiO2) - Archeological lithic artifact