Rock Identifier

Category

Anthropogenic Specimen (Man Made)

Browse anthropogenic specimen (man made) specimens identified by the Rock Identifier community.

White Quartz Pebble (Quartz (Silicon Dioxide, SiO2)) — mineral

White Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Fossil / Permineralized Bone (Tyrannosaurus rex fossil (Hydroxylapatite replaced by various minerals)) — sedimentary

Fossil / Permineralized Bone

Tyrannosaurus rex fossil (Hydroxylapatite replaced by various minerals)

Chert (Jasper nodule) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Chert (Jasper nodule)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Chert Pebble (Jasper/Quartz variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert Pebble (Jasper/Quartz variety)

Microcrystalline Quartz (SiO2)

Sandstone (Ferruginous) (Arenite (primarily SiO2 with Iron Oxide cement)) — sedimentary

Sandstone (Ferruginous)

Arenite (primarily SiO2 with Iron Oxide cement)

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

Chert (Flint)

Chert (Silicon Dioxide, SiO2)

Quartz (Milky/Smoky variety on matrix) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky/Smoky variety on matrix)

Silicon Dioxide (SiO2)

Limestone (River Pebble) (Calcium Carbonate (CaCO3)) — sedimentary

Limestone (River Pebble)

Calcium Carbonate (CaCO3)

Milky Quartz Pebble (Quartz (Silicon Dioxide, SiO2)) — mineral

Milky Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

River Cobble (likely Basalt) (Mafic Igneous Rock (Aphanitic)) — Igneous

River Cobble (likely Basalt)

Mafic Igneous Rock (Aphanitic)

Granite (Phaneritic intrusive igneous rock (composition: Quartz, Alkali Feldspar, Plagioclase Feldspar)) — igneous

Granite

Phaneritic intrusive igneous rock (composition: Quartz, Alkali Feldspar, Plagioclase Feldspar)

Chert (specifically Yellow/Honey Jasper variety) (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (specifically Yellow/Honey Jasper variety)

Cryptocrystalline Quartz (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Quartzite (Quartzite (composed primarily of Quartz, SiO2)) — metamorphic

Quartzite

Quartzite (composed primarily of Quartz, SiO2)

Gneiss (Banded Gneiss) (Gneiss) — metamorphic

Gneiss (Banded Gneiss)

Gneiss

Chert (varieties include Jasper or Flint) (Chert (Microcrystalline Silica, formula: SiO2)) — sedimentary

Chert (varieties include Jasper or Flint)

Chert (Microcrystalline Silica, formula: SiO2)

Quartz Vein / Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz Vein / Milky Quartz

Silicon Dioxide (SiO2)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Quartzite (River Pebble) (Metamorphic Quartzite (SiO2)) — metamorphic

Quartzite (River Pebble)

Metamorphic Quartzite (SiO2)

Chert (Chert (Microcrystalline Silica, SiO2)) — sedimentary

Chert

Chert (Microcrystalline Silica, SiO2)

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

Chert (Gravel)

Microcrystalline Quartz (SiO2)

Chert (Smooth River Pebble) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Smooth River Pebble)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Quartz (specifically Rose or Smoky tinted Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz (specifically Rose or Smoky tinted Quartz)

Silicon Dioxide (SiO2)

Yellow Quartz Pebble (Silicon Dioxide (SiO2)) — Mineral

Yellow Quartz Pebble

Silicon Dioxide (SiO2)

Chalcedony (Agate/Carnelian precursor) (Chalcedony (Silicon Dioxide, SiO2)) — mineral

Chalcedony (Agate/Carnelian precursor)

Chalcedony (Silicon Dioxide, SiO2)

Chert (Brecciated River Cobble) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Brecciated River Cobble)

Silicon Dioxide (SiO2)

Chert (Jasper-rich) (Silicon dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Chert (Jasper-rich)

Silicon dioxide (SiO2) - Microcrystalline Quartz

Banded Chert (River Stone/Cobble) (Microcrystalline Quartz (SiO2)) — sedimentary

Banded Chert (River Stone/Cobble)

Microcrystalline Quartz (SiO2)

Chert (Quartz Variety) (Chert (mostly SiO2 / Silicon Dioxide)) — sedimentary

Chert (Quartz Variety)

Chert (mostly SiO2 / Silicon Dioxide)

Quartz on Matrix (Silicon Dioxide (SiO2)) — mineral

Quartz on Matrix

Silicon Dioxide (SiO2)

River Siltstone / Mudstone Pebble (Siltstone (composed of mixed silicate and carbonate minerals)) — sedimentary

River Siltstone / Mudstone Pebble

Siltstone (composed of mixed silicate and carbonate minerals)

Blue Tiger's Eye (Pseudomorph of Quartz after Crocidolite (SiO2)) — metamorphic

Blue Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Jasper (Petrified Wood variant) (Silicon Dioxide (SiO2) with iron oxide inclusions) — sedimentary

Jasper (Petrified Wood variant)

Silicon Dioxide (SiO2) with iron oxide inclusions

Quartzite (SiO2 (Crystalline Quartz)) — metamorphic

Quartzite

SiO2 (Crystalline Quartz)

Quartz (Milky/Yellowish variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky/Yellowish variety)

Silicon Dioxide (SiO2)

Obsidian Arrowhead (Obsidian (Volcanic Glass), primarily SiO2 (Silicon Dioxide)) — igneous

Obsidian Arrowhead

Obsidian (Volcanic Glass), primarily SiO2 (Silicon Dioxide)

Chert (Pebble) (Microcrystalline silica (SiO2)) — sedimentary

Chert (Pebble)

Microcrystalline silica (SiO2)

Pink Tumbled Agate (Dyed) (Silicon Dioxide (SiO2) with artificial dyes) — mineral

Pink Tumbled Agate (Dyed)

Silicon Dioxide (SiO2) with artificial dyes

River Cobble (likely Basalt or Rhyolite) (Extrusive Igneous Rock (Mafic or Intermediate)) — igneous

River Cobble (likely Basalt or Rhyolite)

Extrusive Igneous Rock (Mafic or Intermediate)

Diabase (Greenstone Pebble) (Diabase or Dolerite) — igneous

Diabase (Greenstone Pebble)

Diabase or Dolerite

Quartzite (Iron-stained) (Quartzite (SiO2)) — metamorphic

Quartzite (Iron-stained)

Quartzite (SiO2)