Rock Identifier

Category

Mineral Description (Anthropogenic Material)

Browse mineral description (anthropogenic material) specimens identified by the Rock Identifier community.

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

sedimentary
Granite (Granite (Phaneritic intrusive igneous rock)) — igneous

Granite

Granite (Phaneritic intrusive igneous rock)

igneous
Coquina (Bioclastic Limestone (Coquina)) — sedimentary

Coquina

Bioclastic Limestone (Coquina)

sedimentary
Rose Quartz (Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese) — mineral

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

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

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

mineral
Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

mineral
Green Fluorite (Fluorite (Calcium Fluoride - CaF2)) — mineral

Green Fluorite

Fluorite (Calcium Fluoride - CaF2)

mineral
Rose Quartz (Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese) — mineral

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

mineral
Black Jasper (Black Jasper (Silicate mineral - SiO2)) — sedimentary

Black Jasper

Black Jasper (Silicate mineral - SiO2)

sedimentary
Sandstone (Water-worn) (Arenite) — sedimentary

Sandstone (Water-worn)

Arenite

sedimentary
Bauxite (Bauxite (Al(OH)3, AlO(OH))) — sedimentary

Bauxite

Bauxite (Al(OH)3, AlO(OH))

sedimentary
Sandstone (Arenite (SiO2 based with various cements)) — sedimentary

Sandstone

Arenite (SiO2 based with various cements)

sedimentary
Granite Cobble (Plutonic Igneous Rock (Granitic)) — igneous

Granite Cobble

Plutonic Igneous Rock (Granitic)

igneous
Diamond (Native Carbon (C)) — mineral

Diamond

Native Carbon (C)

mineral
Chert (Jasper-bearing) (Microcrystalline silica (SiO2) with iron oxide inclusions) — sedimentary

Chert (Jasper-bearing)

Microcrystalline silica (SiO2) with iron oxide inclusions

sedimentary
Chert (and Petrified Wood) (Silicon Dioxide (SiO2)) — sedimentary

Chert (and Petrified Wood)

Silicon Dioxide (SiO2)

sedimentary
Biotite Schist (Biotite Schist) — metamorphic

Biotite Schist

Biotite Schist

metamorphic
Green Onyx (Banded Calcite) (Travertine (CaCO3 - Calcium Carbonate)) — sedimentary

Green Onyx (Banded Calcite)

Travertine (CaCO3 - Calcium Carbonate)

sedimentary
Aragonite Star Cluster (Aragonite (Calcium Carbonate - CaCO3)) — mineral

Aragonite Star Cluster

Aragonite (Calcium Carbonate - CaCO3)

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

Milky Quartz

Silicon Dioxide (SiO2)

mineral
Turquoise (Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]) — mineral

Turquoise

Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]

mineral
Chert (often called Jasper in this color variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (often called Jasper in this color variety)

Microcrystalline Quartz (SiO2)

sedimentary
Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

sedimentary
Petrified Wood (Silicified Wood (primarily Chalcedony/Quartz, SiO2)) — sedimentary

Petrified Wood

Silicified Wood (primarily Chalcedony/Quartz, SiO2)

sedimentary
Zebra Rock / Zebra Marble (Banded Limestone-Marble Transition) — metamorphic

Zebra Rock / Zebra Marble

Banded Limestone-Marble Transition

metamorphic
Petrified Wood (Silicified Wood (primarily SiO2)) — sedimentary

Petrified Wood

Silicified Wood (primarily SiO2)

sedimentary
Moss Agate (Silicon Dioxide (SiO2) with mineral inclusions of hornblende or chlorite) — Mineral (variety of Chalcedony)

Moss Agate

Silicon Dioxide (SiO2) with mineral inclusions of hornblende or chlorite

Mineral (variety of Chalcedony)
Agate (Bead Form) (Agate (Cryptocrystalline Quartz, SiO2)) — mineral

Agate (Bead Form)

Agate (Cryptocrystalline Quartz, SiO2)

mineral
Banded Agate (specifically Carnelian Agate) (Cryptocrystalline Quartz (SiO2)) — mineral

Banded Agate (specifically Carnelian Agate)

Cryptocrystalline Quartz (SiO2)

mineral
Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

mineral
Biotite (Black Mica) (Biotite (K(Mg,Fe)3AlSi3O10(OH)2)) — mineral

Biotite (Black Mica)

Biotite (K(Mg,Fe)3AlSi3O10(OH)2)

mineral
Diorite (River Cobble) (Intrusive Igneous Diorite) — igneous

Diorite (River Cobble)

Intrusive Igneous Diorite

igneous
Sandstone (Arenite (SiO2 based with quartz, feldspar, or lithic fragments)) — sedimentary

Sandstone

Arenite (SiO2 based with quartz, feldspar, or lithic fragments)

sedimentary
Clear Quartz (Quartz (Silicon Dioxide, SiO2)) — mineral

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

mineral
Diamond (Carbon (C)) — mineral

Diamond

Carbon (C)

mineral
Gneiss (Gneiss (Metamorphic high-grade)) — metamorphic

Gneiss

Gneiss (Metamorphic high-grade)

metamorphic
Quartz (SiO₂ (Silicon Dioxide)) — Mineral

Quartz

SiO₂ (Silicon Dioxide)

Mineral
Corundum (Corundum (Aluminium oxide, Al2O3)) — mineral

Corundum

Corundum (Aluminium oxide, Al2O3)

mineral
Sandstone with Calcite Vein (Clastic sedimentary rock (primarily SiO2) with Calcium Carbonate (CaCO3) infilling) — sedimentary

Sandstone with Calcite Vein

Clastic sedimentary rock (primarily SiO2) with Calcium Carbonate (CaCO3) infilling

sedimentary
Sandstone (Glacial Cobble) (Arenite / Sedimentary Rock (primarily SiO2)) — sedimentary

Sandstone (Glacial Cobble)

Arenite / Sedimentary Rock (primarily SiO2)

sedimentary
Sandstone (Weathered Pebble) (Arenite (primarily SiO2)) — sedimentary

Sandstone (Weathered Pebble)

Arenite (primarily SiO2)

sedimentary
Chert (variously known as Flint or Microcrystalline Quartz) (Silicon dioxide (SiO2)) — sedimentary

Chert (variously known as Flint or Microcrystalline Quartz)

Silicon dioxide (SiO2)

sedimentary