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

Sandstone (Quartz Sandstone) (Arenite (primarily SiO2)) — sedimentary

Sandstone (Quartz Sandstone)

Arenite (primarily SiO2)

Arsenopyrite with Quartz (Arsenopyrite (FeAsS)) — mineral

Arsenopyrite with Quartz

Arsenopyrite (FeAsS)

Vesicular Basalt (Amygdaloidal Basalt (Mafic extrusive volcanic rock)) — Igneous

Vesicular Basalt

Amygdaloidal Basalt (Mafic extrusive volcanic rock)

Fossil Shark Tooth (Chondrichthyes (class)) — fossil

Fossil Shark Tooth

Chondrichthyes (class)

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

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

Bauxite

Bauxite (mixture of Hydrous Aluminum Oxides)

Sandstone (with potential mineral staining/concretions) (Arenite (SiO2 based)) — sedimentary

Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

Sandstone (Banded) (Arenite) — sedimentary

Sandstone (Banded)

Arenite

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)

Gneiss (Gneiss (High-grade Metamorphic Rock)) — metamorphic

Gneiss

Gneiss (High-grade Metamorphic Rock)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Green Apatite on Albite (Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]) — mineral

Green Apatite on Albite

Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]

Sugilite (Sugilite (KNa2(Fe,Mn,Al)2Li3Si12O30)) — mineral

Sugilite

Sugilite (KNa2(Fe,Mn,Al)2Li3Si12O30)

Sapphirine in Matrix (Sapphirine (Mg,Al)8(Al,Si)6O20) — mineral

Sapphirine in Matrix

Sapphirine (Mg,Al)8(Al,Si)6O20

Garnet (Almandine) (Almandine (Fe3Al2(SiO4)3)) — mineral

Garnet (Almandine)

Almandine (Fe3Al2(SiO4)3)

Mahogany Obsidian (Volcanic glass (high silica) with inclusions of Magnetite or Hematite) — igneous

Mahogany Obsidian

Volcanic glass (high silica) with inclusions of Magnetite or Hematite

Pegmatite (Granitic) (Granitic Pegmatite) — igneous

Pegmatite (Granitic)

Granitic Pegmatite

Dendritic Agate or Manganese Nodule in Chert/Limestone (Silicon Dioxide (SiO2) with Manganese Oxide (MnO2) inclusions) — sedimentary

Dendritic Agate or Manganese Nodule in Chert/Limestone

Silicon Dioxide (SiO2) with Manganese Oxide (MnO2) inclusions

Granitic Gneiss (Gneiss (high-grade metamorphic rock)) — metamorphic

Granitic Gneiss

Gneiss (high-grade metamorphic rock)

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Amygdaloidal Basalt (Amygdaloidal Basalt (Mafic Volcanic Rock)) — Igneous

Amygdaloidal Basalt

Amygdaloidal Basalt (Mafic Volcanic Rock)

Blue quartz-like mineral specimen (Likely quartz (SiO₂), possibly dyed or coated; exact identification requires testing) — mineral

Blue quartz-like mineral specimen

Likely quartz (SiO₂), possibly dyed or coated; exact identification requires testing

Sandstone (Weathered Fragment) (Clastic Sedimentary Rock) — sedimentary

Sandstone (Weathered Fragment)

Clastic Sedimentary Rock

Granite (Granite) — Igneous

Granite

Granite

Sandstone (Arenite (SiO2 + various cementing minerals)) — sedimentary

Sandstone

Arenite (SiO2 + various cementing minerals)

Tree Agate (Silicon Dioxide (SiO2) with Chlorite inclusions) — mineral

Tree Agate

Silicon Dioxide (SiO2) with Chlorite inclusions

Diamond (Native Carbon (C)) — mineral

Diamond

Native Carbon (C)

Dendritic Agate (Silicon Dioxide with inclusions (SiO2 + Mn/Fe)) — mineral

Dendritic Agate

Silicon Dioxide with inclusions (SiO2 + Mn/Fe)

Sandstone (Clastic Sedimentary Rock) — sedimentary

Sandstone

Clastic Sedimentary Rock

Rutilated Quartz (Silicon Dioxide (SiO2) with inclusions of Titanium Dioxide (TiO2)) — mineral

Rutilated Quartz

Silicon Dioxide (SiO2) with inclusions of Titanium Dioxide (TiO2)

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Gypsum (variety Selenite or Alabaster) (Calcium sulfate dihydrate (CaSO4·2H2O)) — Mineral

Gypsum (variety Selenite or Alabaster)

Calcium sulfate dihydrate (CaSO4·2H2O)

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

Echinoid Fossil (Sea Urchin Fossil)

Echinoidea

Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

Granite Pegmatite (Phaneritic Plutonic Igneous Rock) — igneous

Granite Pegmatite

Phaneritic Plutonic Igneous Rock

Banded Gneiss (Banded Gneiss (Metamorphic Rock)) — metamorphic

Banded Gneiss

Banded Gneiss (Metamorphic Rock)

Gneiss (Gneiss (High-grade metamorphic rock)) — metamorphic

Gneiss

Gneiss (High-grade metamorphic rock)

Sandstone (Arenite (Sedimentary Rock)) — sedimentary

Sandstone

Arenite (Sedimentary Rock)