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

Dunite

Gondite

Limestone

Coquina

Sandstone (Arenite (lithic or quartz sandstone)) — sedimentary

Sandstone

Arenite (lithic or quartz sandstone)

Granite (Phaneritic plutonic rock (Quartz, Feldspar, Mica)) — igneous

Granite

Phaneritic plutonic rock (Quartz, Feldspar, Mica)

Slate (Slate (Low-grade foliated metamorphic rock)) — metamorphic

Slate

Slate (Low-grade foliated metamorphic rock)

Brecciated jasper (likely red-and-cream jasper) (Jasper, an opaque microcrystalline variety of quartz; primarily cryptocrystalline SiO₂ with iron-oxide staining and possible chalcedony/quartz veining) — gemstone

Brecciated jasper (likely red-and-cream jasper)

Jasper, an opaque microcrystalline variety of quartz; primarily cryptocrystalline SiO₂ with iron-oxide staining and possible chalcedony/quartz veining

Tumbled and polished quartz crystal points (Quartz (silicon dioxide, SiO₂), chiefly rock crystal with smoky or included varieties) — mineral

Tumbled and polished quartz crystal points

Quartz (silicon dioxide, SiO₂), chiefly rock crystal with smoky or included varieties

Basalt Pebble (Basalt) — igneous

Basalt Pebble

Basalt

Tumbled carnelian agate (Cryptocrystalline chalcedony (SiO₂), an iron-colored variety of agate) — gemstone

Tumbled carnelian agate

Cryptocrystalline chalcedony (SiO₂), an iron-colored variety of agate

Weathered gray stone, possibly limestone or concrete-like carbonate rock (Tentatively micritic limestone (calcium carbonate, CaCO₃); exact identification is uncertain from the image) — sedimentary

Weathered gray stone, possibly limestone or concrete-like carbonate rock

Tentatively micritic limestone (calcium carbonate, CaCO₃); exact identification is uncertain from the image

Pumice (Pumice (Silicic volcanic glass with vesicular structure)) — igneous

Pumice

Pumice (Silicic volcanic glass with vesicular structure)

Picture Jasper (Silicified sedimentary or volcanic rock (primarily SiO2)) — sedimentary

Picture Jasper

Silicified sedimentary or volcanic rock (primarily SiO2)

Silty Shale (Silty Shale (Fissile Sedimentary Rock)) — sedimentary

Silty Shale

Silty Shale (Fissile Sedimentary Rock)

Carved serpentine wing sculpture (Serpentine-group rock, chiefly antigorite/lizardite: Mg3Si2O5(OH)4) — metamorphic

Carved serpentine wing sculpture

Serpentine-group rock, chiefly antigorite/lizardite: Mg3Si2O5(OH)4

Sapphire (Corundum (Al2O3)) — mineral

Sapphire

Corundum (Al2O3)

Limonite / Ironstone Concretion (Hydrated Iron Oxide (FeO(OH)%C2%B7nH2O)) — sedimentary

Limonite / Ironstone Concretion

Hydrated Iron Oxide (FeO(OH)%C2%B7nH2O)

Quartzite Pebble (Quartzite (SiO2-rich metamorphic rock)) — metamorphic

Quartzite Pebble

Quartzite (SiO2-rich metamorphic rock)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Agate and Amethyst (Quartz variants) (Silicon Dioxide (SiO2) - Microcrystalline Quartz and Crystalline Quartz) — mineral

Agate and Amethyst (Quartz variants)

Silicon Dioxide (SiO2) - Microcrystalline Quartz and Crystalline Quartz

Green Tiger's Eye (Silicified Crocidolite (Quartz variety, SiO2)) — metamorphic

Green Tiger's Eye

Silicified Crocidolite (Quartz variety, SiO2)

Shale (Fissile mudstone (primarily clay minerals and silt-sized quartz)) — sedimentary

Shale

Fissile mudstone (primarily clay minerals and silt-sized quartz)

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

Quartz (Milky/Smoky Quartz)

Silicon Dioxide (SiO2)

Dyed Agate (Agate (SiO2)) — Mineral

Dyed Agate

Agate (SiO2)

Dalmatian jasper (Orbicular microcrystalline quartz rock, commonly rhyolitic or volcanic-feldspar matrix with black arfvedsonite/alkali-amphibole inclusions) — igneous

Dalmatian jasper

Orbicular microcrystalline quartz rock, commonly rhyolitic or volcanic-feldspar matrix with black arfvedsonite/alkali-amphibole inclusions

Basalt Pebble (Basalt (Mafic Extrusive Igneous Rock)) — igneous

Basalt Pebble

Basalt (Mafic Extrusive Igneous Rock)

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

Banded Chert

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Rough Emerald/Green Beryl (Beryl (Be3Al2(SiO3)6) with trace amounts of Chromium or Vanadium) — mineral

Rough Emerald/Green Beryl

Beryl (Be3Al2(SiO3)6) with trace amounts of Chromium or Vanadium

Sandstone (Ferruginous) (Clastic Sedimentary Rock (primarily SiO2 with Fe2O3 staining)) — sedimentary

Sandstone (Ferruginous)

Clastic Sedimentary Rock (primarily SiO2 with Fe2O3 staining)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Pumice (Pumice (Amorphous volcanic glass)) — igneous

Pumice

Pumice (Amorphous volcanic glass)

Pink Granite (Phaneritic Felsic Intrusive Igneous Rock) — igneous

Pink Granite

Phaneritic Felsic Intrusive Igneous Rock

Obsidian (Volcanic glass (silica-rich rhyolitic melt; primarily SiO₂)) — igneous

Obsidian

Volcanic glass (silica-rich rhyolitic melt; primarily SiO₂)

Clear Quartz (Rock Crystal) (Silicon Dioxide (SiO2)) — mineral

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

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

Yellow Chert (Yellow Jasper)

Silicon Dioxide (SiO2)

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

Quartzite

Quartzite (composed primarily of silica, SiO2)

Quartz Geode (Smoky Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz Geode (Smoky Quartz)

Silicon Dioxide (SiO2)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Obsidian (Obsidian (volcanic glass)) — Igneous

Obsidian

Obsidian (volcanic glass)

Basalt (Basalt (Mafic Aphanitic Igneous Rock)) — igneous

Basalt

Basalt (Mafic Aphanitic Igneous Rock)

Green Aventurine (Gua Sha tool) (Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)) — metamorphic

Green Aventurine (Gua Sha tool)

Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)

Jasper Pebble (Silicon Dioxide (SiO2) - Microcrystalline Quartz with Iron Oxide Impurities) — sedimentary

Jasper Pebble

Silicon Dioxide (SiO2) - Microcrystalline Quartz with Iron Oxide Impurities

Pink Granite (Phaneritic Igneous Rock (high K-Feldspar content)) — igneous

Pink Granite

Phaneritic Igneous Rock (high K-Feldspar content)

Clear Quartz (Silicon dioxide (SiO2)) — mineral

Clear Quartz

Silicon dioxide (SiO2)

Limonite (Ironstone) (Limonite (FeOO·nH2O)) — mineral

Limonite (Ironstone)

Limonite (FeOO·nH2O)