Rock Identifier

Category

Mineral Like (Anthropogenic)

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

Learn about Mineral Like (Anthropogenic) in the encyclopedia

Calc-Silicate Rock

Calc-Silicate Rock

Garden Quartz

Ribbon Jasper

Sagenite Agate

Leopard Skin Jasper

Leopard Skin Jasper

Flower Jasper

Feather Jasper

Dendritic Opal

Starburst Agate

Plume Agate

Feather Agate

Moss Opal

Agate (Moss or Dendritic Agate) (Chalcedony (Silicon Dioxide, SiO2)) — mineral

Agate (Moss or Dendritic Agate)

Chalcedony (Silicon Dioxide, SiO2)

Ruby (Raw Corundum) (Al2O3 (Aluminum Oxide)) — mineral

Ruby (Raw Corundum)

Al2O3 (Aluminum Oxide)

Orthoclase Feldspar with Quartz (Orthoclase (KAlSi3O8)) — mineral

Orthoclase Feldspar with Quartz

Orthoclase (KAlSi3O8)

Gneiss (Banded Gneiss) — metamorphic

Gneiss

Banded Gneiss

Schist (Mica Schist) — Metamorphic Rock

Schist

Mica Schist

Metamorphic Rock

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Sunstone (Feldspar) (Plagioclase Feldspar (Na,Ca)(Al,Si)4O8 with inclusions of Hematite/Goethite) — mineral

Sunstone (Feldspar)

Plagioclase Feldspar (Na,Ca)(Al,Si)4O8 with inclusions of Hematite/Goethite

Ruby (Corundum (Al2O3)) — mineral

Ruby

Corundum (Al2O3)

Quartz with Iron Staining and Chlorite Inclusions (Silicon Dioxide (SiO2)) — mineral

Quartz with Iron Staining and Chlorite Inclusions

Silicon Dioxide (SiO2)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Pegmatite (Granitic Pegmatite) — igneous

Pegmatite

Granitic Pegmatite

Quartz Geode (Crystalline Silicon Dioxide (SiO2) in sedimentary matrix) — sedimentary

Quartz Geode

Crystalline Silicon Dioxide (SiO2) in sedimentary matrix

Mixed River Pebbles (Jasper, Hematite, and Quartzites) (Silicon dioxide (Jasper/Quartz) and Iron oxide (Hematite)) — sedimentary

Mixed River Pebbles (Jasper, Hematite, and Quartzites)

Silicon dioxide (Jasper/Quartz) and Iron oxide (Hematite)

Echinoid Fossil (Sea Urchin Fossil) (Echinoidea) — fossil

Echinoid Fossil (Sea Urchin Fossil)

Echinoidea

Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

Green Schist (Greenschist (Chlorite Schist)) — metamorphic

Green Schist

Greenschist (Chlorite Schist)

Concretion (Sedimentary Concretion (e.g., Siderite or Ironstone)) — sedimentary

Concretion

Sedimentary Concretion (e.g., Siderite or Ironstone)

Sagenitic Agate (with Goethite/Rutile inclusions) (Silicon Dioxide (SiO2) with hydrous ferric oxide inclusions) — mineral

Sagenitic Agate (with Goethite/Rutile inclusions)

Silicon Dioxide (SiO2) with hydrous ferric oxide inclusions

Gneiss (Metamorphic Gneiss) — metamorphic

Gneiss

Metamorphic Gneiss

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

Biotite (Mica)

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

Desert Rose (Barite Rose or Gypsum Rose) (Barium Sulfate (BaSO4) / Hydrated Calcium Sulfate (CaSO4·2H2O)) — mineral

Desert Rose (Barite Rose or Gypsum Rose)

Barium Sulfate (BaSO4) / Hydrated Calcium Sulfate (CaSO4·2H2O)

Dendritic Agate / Chalcedony (Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions) — mineral

Dendritic Agate / Chalcedony

Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions

Quartz-Veined Sandstone (Quartz-veined Arenite) — sedimentary

Quartz-Veined Sandstone

Quartz-veined Arenite

Feldspar (Orthoclase) (Potassium Feldspar (KAlSi3O8)) — mineral

Feldspar (Orthoclase)

Potassium Feldspar (KAlSi3O8)

Sandstone (Arenite (SiO2 primarily)) — sedimentary

Sandstone

Arenite (SiO2 primarily)

Bauxite (Pisolitic Bauxite) (Bauxite (mixture of Hydrous Aluminum Oxides)) — sedimentary

Bauxite (Pisolitic Bauxite)

Bauxite (mixture of Hydrous Aluminum Oxides)

Mica Schist (Muscovite/Biotite Schist) — metamorphic

Mica Schist

Muscovite/Biotite Schist

Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Gneissic Schist (Foliated Metamorphic Rock (Schist/Gneiss transition)) — metamorphic

Gneissic Schist

Foliated Metamorphic Rock (Schist/Gneiss transition)

Limonite (FeO(OH)•nH2O) — mineral

Limonite

FeO(OH)•nH2O

Limonite (FeO(OH)•nH2O) — mineral

Limonite

FeO(OH)•nH2O

Polished agate with possible iron-oxide inclusions (Microcrystalline quartz (chalcedony), SiO₂; inclusions appear to be iron oxides, possibly goethite or hematite) — mineral

Polished agate with possible iron-oxide inclusions

Microcrystalline quartz (chalcedony), SiO₂; inclusions appear to be iron oxides, possibly goethite or hematite

Corundum (Sapphire/Ruby in Matrix) (Aluminium oxide (Al2O3)) — mineral

Corundum (Sapphire/Ruby in Matrix)

Aluminium oxide (Al2O3)

Sandstone Concretion with Quartz Center (Sedimentary Clastic Rock (SiO2 matrix with Quartz core)) — sedimentary

Sandstone Concretion with Quartz Center

Sedimentary Clastic Rock (SiO2 matrix with Quartz core)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Sandstone Pebble (Arenite (SiO2 based)) — sedimentary

Sandstone Pebble

Arenite (SiO2 based)

Tektite (Tektite (meteoritic glass)) — meteorite

Tektite

Tektite (meteoritic glass)

Rose Quartz (Silicon Dioxide (SiO2)) — mineral

Rose Quartz

Silicon Dioxide (SiO2)

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

Biotite Mica

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

Feldspar (specifically Orthoclase) (Potassium aluminum silicate (KAlSi3O8)) — mineral

Feldspar (specifically Orthoclase)

Potassium aluminum silicate (KAlSi3O8)