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 (Banded) (Clastic Sedimentary Rock (primarily SiO2)) — sedimentary

Sandstone (Banded)

Clastic Sedimentary Rock (primarily SiO2)

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

Dendritic Agate

Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions

Limonite (Ironstone) (FeO(OH)qn H2O) — sedimentary

Limonite (Ironstone)

FeO(OH)qn H2O

Quartz with Tourmaline inclusions (Silicon Dioxide (SiO2) with Tourmaline needles) — mineral

Quartz with Tourmaline inclusions

Silicon Dioxide (SiO2) with Tourmaline needles

Fossilized Shark Tooth (Megalodon or Carcharocles species fragment) (Otodus megalodon / Carcharocles spp. (Apatite / Calcium Phosphate)) — fossil

Fossilized Shark Tooth (Megalodon or Carcharocles species fragment)

Otodus megalodon / Carcharocles spp. (Apatite / Calcium Phosphate)

Obsidian (Volcanic Glass (predominantly SiO2)) — igneous

Obsidian

Volcanic Glass (predominantly SiO2)

Petrified Wood Agate (Silicified Wood (primarily SiO2)) — fossil

Petrified Wood Agate

Silicified Wood (primarily SiO2)

Vanadinite (Pb5(VO4)3Cl) — mineral

Vanadinite

Pb5(VO4)3Cl

Yellow Jasper Pebble (Silicon Dioxide (SiO2) with Iron Oxide inclusions) — mineral

Yellow Jasper Pebble

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Schist (Diamond Drill Core) (Mica Schist) — metamorphic

Schist (Diamond Drill Core)

Mica Schist

Quartz Geode Fragment (Silicon Dioxide (SiO2) in a Sedimentary Host) — mineral

Quartz Geode Fragment

Silicon Dioxide (SiO2) in a Sedimentary Host

Vanadinite (Pb5(VO4)3Cl) — mineral

Vanadinite

Pb5(VO4)3Cl

Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2) — mineral

Lepidolite

K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2

Limonite with Ironstone (Limonite (hydrated iron(III) oxide-hydroxides), FeO(OH)·nH2O) — mineral

Limonite with Ironstone

Limonite (hydrated iron(III) oxide-hydroxides), FeO(OH)·nH2O

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

Limonite (Iron Ore)

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

Sandstone (Quartzose Sandstone (Sedimentary Rock)) — sedimentary

Sandstone

Quartzose Sandstone (Sedimentary Rock)

Sandstone and Mixed Rock Assemblage (Clastic Sedimentary Rock / Quartz Arenite) — sedimentary

Sandstone and Mixed Rock Assemblage

Clastic Sedimentary Rock / Quartz Arenite

African Turquoise (Jasper) (Silicon Dioxide (SiO2) - Macro-crystalline Quartz with inclusions) — sedimentary

African Turquoise (Jasper)

Silicon Dioxide (SiO2) - Macro-crystalline Quartz with inclusions

Agate (Plume/Moss variety) (Cryptocrystalline Quartz (SiO2) with iron/manganese inclusions) — mineral

Agate (Plume/Moss variety)

Cryptocrystalline Quartz (SiO2) with iron/manganese inclusions

Limonite (Iron Ore) (FeO(OH)·nH2O) — mineral

Limonite (Iron Ore)

FeO(OH)·nH2O

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)

Sandstone (Quartzose) (Arenite (SiO2 based typically)) — sedimentary

Sandstone (Quartzose)

Arenite (SiO2 based typically)

Calcite (Yellow/Orange variety - sometimes called Honey Calcite) (Calcite) — Mineral

Calcite (Yellow/Orange variety - sometimes called Honey Calcite)

Calcite

Schist (Chlorite or Mica Schist) — metamorphic

Schist

Chlorite or Mica Schist

Blue Quartz (Silicon Dioxide (SiO2) with inclusions) — mineral

Blue Quartz

Silicon Dioxide (SiO2) with inclusions

Sandstone (Clastic Sedimentary Rock) — sedimentary

Sandstone

Clastic Sedimentary Rock

Educational Geologic Collection (Mixed Mineral and Rock Collection (Various compositions)) — mineral

Educational Geologic Collection

Mixed Mineral and Rock Collection (Various compositions)

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

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Moss Agate (Silicon Dioxide (SiO2) with inclusions) — mineral

Moss Agate

Silicon Dioxide (SiO2) with inclusions

Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

Rough amber-like brown mineral specimen (Uncertain from photograph; possibly iron-stained quartz, common opal, or resinous amber) — mineral

Rough amber-like brown mineral specimen

Uncertain from photograph; possibly iron-stained quartz, common opal, or resinous amber

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

Eclipse Stone (Kabamba Jasper)

Rhyolite with Aegirine (NaFe3+Si2O6)

Sandstone Pebble (Arenite (SiO2 complex)) — sedimentary

Sandstone Pebble

Arenite (SiO2 complex)

Limonite (Iron Ore) (Limonite (FeO(OH)·nH2O)) — mineral

Limonite (Iron Ore)

Limonite (FeO(OH)·nH2O)

Polished Mexican “Crazy Lace” agate tower (Microcrystalline quartz (chalcedony), SiO₂, with iron-oxide inclusions) — mineral

Polished Mexican “Crazy Lace” agate tower

Microcrystalline quartz (chalcedony), SiO₂, with iron-oxide inclusions

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Polished Black Obsidian (Volcanic Glass (70-75% SiO2)) — igneous

Polished Black Obsidian

Volcanic Glass (70-75% SiO2)

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

Fossilized Shark Tooth (Carcharodon (Galeocerdo sp. or Lamniform)) — mineral

Fossilized Shark Tooth

Carcharodon (Galeocerdo sp. or Lamniform)

Quartz with Tourmaline inclusion (Tourmalinated Quartz) (Silicon Dioxide (SiO2) with Tourmaline inclusions) — mineral

Quartz with Tourmaline inclusion (Tourmalinated Quartz)

Silicon Dioxide (SiO2) with Tourmaline inclusions