Rock Identifier

Category

Man Made Material

Browse man made material specimens identified by the Rock Identifier community.

Learn about Man Made Material in the encyclopedia

Opalite

Goldstone

Blue Goldstone

Dunite

Zincite

Mint Obsidian

Crimson Obsidian

Lherzolite

Violet Obsidian

Tangerine Obsidian

Pastel Obsidian

Lilac Obsidian

Granodiorite (Granodiorite (Intermediate intrusive igneous rock)) — igneous

Granodiorite

Granodiorite (Intermediate intrusive igneous rock)

Scoria (Vesicular Basalt / Scoriaceous Basalt) — igneous

Scoria

Vesicular Basalt / Scoriaceous Basalt

Bornite (Bornite (Cu5FeS4)) — mineral

Bornite

Bornite (Cu5FeS4)

Milky quartz fragment (Quartz (silicon dioxide, SiO₂)) — mineral

Milky quartz fragment

Quartz (silicon dioxide, SiO₂)

Rhodonite-bearing metamorphic rock (Manganese-rich metamorphic rock, chiefly rhodonite (MnSiO₃), with quartz and manganese oxides) — metamorphic

Rhodonite-bearing metamorphic rock

Manganese-rich metamorphic rock, chiefly rhodonite (MnSiO₃), with quartz and manganese oxides

Red Sandstone (Arenite (primarily Quartz with Hematite cement)) — sedimentary

Red Sandstone

Arenite (primarily Quartz with Hematite cement)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Chert (Flint) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Flint)

Silicon Dioxide (SiO2)

Moss Agate (Chalcedony (SiO2) with inclusions of manganese or iron oxides) — mineral

Moss Agate

Chalcedony (SiO2) with inclusions of manganese or iron oxides

Milky Quartz with Mineral Inclusions (Silicon Dioxide (SiO2)) — mineral

Milky Quartz with Mineral Inclusions

Silicon Dioxide (SiO2)

Cream River Jasper (Silicified microcrystalline quartz (SiO2)) — sedimentary

Cream River Jasper

Silicified microcrystalline quartz (SiO2)

Black Jasper (Black Stone / River Pebble) (Silicon Dioxide (SiO₂), Opaque variety of Chalcedony) — sedimentary

Black Jasper (Black Stone / River Pebble)

Silicon Dioxide (SiO₂), Opaque variety of Chalcedony

Fossil Shell (Bivalve) (Class Bivalvia (fossilized)) — fossil

Fossil Shell (Bivalve)

Class Bivalvia (fossilized)

Greenstone (Protolith of basalt, diabase, or gabbro; often contains minerals like chlorite, actinolite, and epidote) — metamorphic

Greenstone

Protolith of basalt, diabase, or gabbro; often contains minerals like chlorite, actinolite, and epidote

Lepidolite (in Quartz Matrix) (Lepidolite [K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2]) — mineral

Lepidolite (in Quartz Matrix)

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

Probable serpentinite (serpentine-rich rock) (Serpentinite; chiefly serpentine-group minerals (Mg₃Si₂O₅(OH)₄), with possible magnetite and olivine remnants) — metamorphic

Probable serpentinite (serpentine-rich rock)

Serpentinite; chiefly serpentine-group minerals (Mg₃Si₂O₅(OH)₄), with possible magnetite and olivine remnants

Red Sandstone (Sandstone (lithic arenite / ferruginous sandstone)) — sedimentary

Red Sandstone

Sandstone (lithic arenite / ferruginous sandstone)

Gypsum crystal cluster (selenite/ satin-spar variety) (Gypsum — calcium sulfate dihydrate, CaSO₄·2H₂O) — mineral

Gypsum crystal cluster (selenite/ satin-spar variety)

Gypsum — calcium sulfate dihydrate, CaSO₄·2H₂O

Diamond (Diamond (C)) — Mineral

Diamond

Diamond (C)

Tumbled dark green stone, likely serpentine (Serpentinite; chiefly serpentine-group minerals (Mg₃Si₂O₅(OH)₄)) — metamorphic

Tumbled dark green stone, likely serpentine

Serpentinite; chiefly serpentine-group minerals (Mg₃Si₂O₅(OH)₄)

Serpentinite (Serpentinite (composed largely of serpentine minerals like antigorite, lizardite, or chrysotile)) — metamorphic

Serpentinite

Serpentinite (composed largely of serpentine minerals like antigorite, lizardite, or chrysotile)

Rose quartz (likely) (Quartz, silicon dioxide (SiO₂), pink variety) — mineral

Rose quartz (likely)

Quartz, silicon dioxide (SiO₂), pink variety

Rose quartz (Quartz, silicon dioxide (SiO₂), pink variety) — mineral

Rose quartz

Quartz, silicon dioxide (SiO₂), pink variety

Diamond (Diamond (pure Carbon, C)) — mineral

Diamond

Diamond (pure Carbon, C)

Diamond (Carbon (C)) — mineral

Diamond

Carbon (C)

Petrified Wood (Silicified Wood (SiO2)) — fossil

Petrified Wood

Silicified Wood (SiO2)

Seashell fragment (Calcium carbonate (CaCO3)) — Biogenic material

Seashell fragment

Calcium carbonate (CaCO3)

Biogenic material

Petrified Wood (Silicified wood (Quartz variant, SiO2)) — sedimentary

Petrified Wood

Silicified wood (Quartz variant, SiO2)

Banded gneiss pebble (Gneiss, commonly quartz–feldspar–mica gneiss) — metamorphic

Banded gneiss pebble

Gneiss, commonly quartz–feldspar–mica gneiss

Sodalite (Sodalite (Na8(Al6Si6O24)Cl2)) — mineral

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Serpentinite (Serpentinite (composed primarily of minerals in the Serpentine group)) — metamorphic

Serpentinite

Serpentinite (composed primarily of minerals in the Serpentine group)

Tiffany Stone (Bertrandite Fluorite (CaF2 + Be4Si2O7(OH)2)) — metamorphic

Tiffany Stone

Bertrandite Fluorite (CaF2 + Be4Si2O7(OH)2)

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

Serpentinite (likely serpentine-rich metamorphic rock) (Serpentine-group minerals, chiefly antigorite, lizardite, and/or chrysotile; commonly derived from altered peridotite) — metamorphic

Serpentinite (likely serpentine-rich metamorphic rock)

Serpentine-group minerals, chiefly antigorite, lizardite, and/or chrysotile; commonly derived from altered peridotite

Rose Quartz (Silicon Dioxide (SiO2)) — mineral

Rose Quartz

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

Petrified Wood

Silicified Wood (primarily SiO2)

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

Petrified Wood

Silicified Wood (primarily SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Pumice (Pumice (Volcanic Rock)) — igneous

Pumice

Pumice (Volcanic Rock)

Flint or chert (Microcrystalline quartz (SiO₂), commonly called flint when dark and nodular) — sedimentary

Flint or chert

Microcrystalline quartz (SiO₂), commonly called flint when dark and nodular

Granitoid (Granitic Rock) (Granitoid (Quartzo-feldspathic plutonic rock)) — igneous

Granitoid (Granitic Rock)

Granitoid (Quartzo-feldspathic plutonic rock)