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

Polished snowflake obsidian (Obsidian (volcanic glass), likely with cristobalite or feldspar spherulites) — igneous

Polished snowflake obsidian

Obsidian (volcanic glass), likely with cristobalite or feldspar spherulites

Fossilized bone fragment (Mineral-replaced vertebrate bone, commonly apatite [Ca₅(PO₄)₃(F,OH,Cl)]) — fossil

Fossilized bone fragment

Mineral-replaced vertebrate bone, commonly apatite [Ca₅(PO₄)₃(F,OH,Cl)]

Obsidian (specifically Mahogany Obsidian) (Volcanic glass (high silica content, SiO2)) — igneous

Obsidian (specifically Mahogany Obsidian)

Volcanic glass (high silica content, SiO2)

Quartz Sand Grain (Silicon Dioxide (SiO2)) — sedimentary

Quartz Sand Grain

Silicon Dioxide (SiO2)

Eclipse Stone (Kabamba Jasper) (Rhyolite with Aegirine (NaFe3+Si2O6)) — metamorphic

Eclipse Stone (Kabamba Jasper)

Rhyolite with Aegirine (NaFe3+Si2O6)

Sandstone Concretion (Moqui Marble / Iron-oxide Concretion (SiO2 with Hematite/Goethite)) — sedimentary

Sandstone Concretion

Moqui Marble / Iron-oxide Concretion (SiO2 with Hematite/Goethite)

Limonite (Ironstone) (Goethite/Limonite (Hydrated iron(III) oxide-hydroxide)) — mineral

Limonite (Ironstone)

Goethite/Limonite (Hydrated iron(III) oxide-hydroxide)

Petrified Wood (Silicified Wood (primarily SiO2)) — mineral

Petrified Wood

Silicified Wood (primarily SiO2)

Limonite (FeO(OH)•nH2O) — mineral

Limonite

FeO(OH)•nH2O

Lepidolite (K(Li,Al)3(Al,Si,4)10(O,F,OH)2) — mineral

Lepidolite

K(Li,Al)3(Al,Si,4)10(O,F,OH)2

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

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Pegmatite (with Quartz and Feldspar) (Granitic Pegmatite) — igneous

Pegmatite (with Quartz and Feldspar)

Granitic Pegmatite

Prehnite (Prehnite (Ca2Al2Si3O10(OH)2)) — mineral

Prehnite

Prehnite (Ca2Al2Si3O10(OH)2)

Peacock Ore (Chalcopyrite/Bornite) (Bornite (Cu5FeS4) or iridescent treated Chalcopyrite (CuFeS2)) — Mineral

Peacock Ore (Chalcopyrite/Bornite)

Bornite (Cu5FeS4) or iridescent treated Chalcopyrite (CuFeS2)

Conglomerate (Quartz Conglomerate) — sedimentary

Conglomerate

Quartz Conglomerate

Conglomerate (Conglomerative Rudite (SiO2/CaCO3 matrix)) — sedimentary

Conglomerate

Conglomerative Rudite (SiO2/CaCO3 matrix)

Ferruginous Sandstone (Ferruginous Quartz-Arenite) — sedimentary

Ferruginous Sandstone

Ferruginous Quartz-Arenite

Sandstone (Arenite (mostly Quartz-based)) — sedimentary

Sandstone

Arenite (mostly Quartz-based)

Conglomerate (Conglomerate (Sedimentary Rock)) — sedimentary

Conglomerate

Conglomerate (Sedimentary Rock)

Quartz (Iron-stained) (Silicon Dioxide (SiO2)) — mineral

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Tumbled amethyst (likely) (Quartz, SiO₂; purple variety known as amethyst) — gemstone

Tumbled amethyst (likely)

Quartz, SiO₂; purple variety known as amethyst

Muscovite (KAl2(AlSi3O10)(OH)2) — mineral

Muscovite

KAl2(AlSi3O10)(OH)2

Fossil Shark Tooth (Carcharodon or Carcharias fossil (Vertebrate Fossil)) — sedimentary

Fossil Shark Tooth

Carcharodon or Carcharias fossil (Vertebrate Fossil)

Limonite (Iron Ore) (FeO(OH)·nH2O (Hydrated iron(III) oxide-hydroxide)) — mineral

Limonite (Iron Ore)

FeO(OH)·nH2O (Hydrated iron(III) oxide-hydroxide)

Desert Rose (Gypsum or Barite (CaSO4·2H2O or BaSO4)) — mineral

Desert Rose

Gypsum or Barite (CaSO4·2H2O or BaSO4)

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

Amygdaloidal Basalt

Amygdaloidal Basalt (Mafic Volcanic Rock)

Diorite (Diorite) — igneous

Diorite

Diorite

Fluorite (Calcium fluoride (CaF2)) — mineral

Fluorite

Calcium fluoride (CaF2)

Sandstone (Arenite (SiO2 principal)) — sedimentary

Sandstone

Arenite (SiO2 principal)

Graphic Granite / Pegmatite (Graphic Granite (Alkali Feldspar and Quartz)) — igneous

Graphic Granite / Pegmatite

Graphic Granite (Alkali Feldspar and Quartz)

Tyrannosaurus Rex Fossil Skull (Tyrannosaurus rex) — fossil

Tyrannosaurus Rex Fossil Skull

Tyrannosaurus rex

Sandstone (Sedimentary Rock (Quartz arenite)) — sedimentary

Sandstone

Sedimentary Rock (Quartz arenite)

Garden Quartz (Lodalite) (Silicon Dioxide (SiO2) with various inclusions) — mineral

Garden Quartz (Lodalite)

Silicon Dioxide (SiO2) with various inclusions

Sandstone (Clastic sedimentary rock) — sedimentary

Sandstone

Clastic sedimentary rock

Sandstone (Clastic Sedimentary Rock) — sedimentary

Sandstone

Clastic Sedimentary Rock

Diorite (Intermediate Phaneritic Plutonic Rock - Diorite) — igneous

Diorite

Intermediate Phaneritic Plutonic Rock - Diorite

Kimberlite with Diamond (Kimberlite (Porphyritic Peridotite)) — igneous

Kimberlite with Diamond

Kimberlite (Porphyritic Peridotite)

Dendritic Rhodonite (Rhodonite (Manganese Silicate), (Mn,Fe,Mg,Ca)SiO3) — mineral

Dendritic Rhodonite

Rhodonite (Manganese Silicate), (Mn,Fe,Mg,Ca)SiO3

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

Biotite (Black Mica)

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

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

Arsenopyrite with Quartz (Arsenopyrite (FeAsS)) — mineral

Arsenopyrite with Quartz

Arsenopyrite (FeAsS)

Green Aventurine (Quartz (Silicon Dioxide, SiO2) with fuchsite inclusions) — mineral

Green Aventurine

Quartz (Silicon Dioxide, SiO2) with fuchsite inclusions