Rock Identifier

Category

Man Made

Browse man made specimens identified by the Rock Identifier community.

Learn about Man Made in the encyclopedia

Opalite

Goldstone

Blue Goldstone

Zincite

Map Jasper

Mandarin Garnet

Mandarin Garnet

Andalusite

Marl

Dunite

Coquina

Dalmatian Jasper

Dalmatian Jasper

Chalk

Quartzite (Quartzite (primarily Silicon Dioxide, SiO2)) — metamorphic

Quartzite

Quartzite (primarily Silicon Dioxide, SiO2)

Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

Carnelian (a variety of Chalcedony) (SiO2 (Silicon Dioxide) - Cryptocrystalline Quartz) — mineral

Carnelian (a variety of Chalcedony)

SiO2 (Silicon Dioxide) - Cryptocrystalline Quartz

Quartz Geode (Silicon Dioxide (SiO2) in a concretion) — sedimentary

Quartz Geode

Silicon Dioxide (SiO2) in a concretion

Amethyst (Amethyst (Silicon Dioxide - SiO2 with iron impurities)) — mineral

Amethyst

Amethyst (Silicon Dioxide - SiO2 with iron impurities)

Red Jasper (Silicon Dioxide (SiO2) with iron oxide inclusions) — mineral

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Red Jasper (possibly Wonderstone) (Silicon Dioxide (SiO2) with iron oxide inclusions) — sedimentary

Red Jasper (possibly Wonderstone)

Silicon Dioxide (SiO2) with iron oxide inclusions

Banded Sandstone (Clastic Sandstone (SiO2 with iron oxides)) — sedimentary

Banded Sandstone

Clastic Sandstone (SiO2 with iron oxides)

Red Sandstone (Arenite (primarily Quartz with Iron Oxide coating)) — sedimentary

Red Sandstone

Arenite (primarily Quartz with Iron Oxide coating)

Chalcedony (Botryoidal Agate) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Botryoidal Agate)

Silicon Dioxide (SiO2)

Banded Iron Formation (BIF) (Banded Iron Formation) — Sedimentary Rock

Banded Iron Formation (BIF)

Banded Iron Formation

Sedimentary Rock

Jade (Nephrite or Jadeite) (Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (Na(Al,Fe3+)Si2O6)) — Mineral

Jade (Nephrite or Jadeite)

Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (Na(Al,Fe3+)Si2O6)

Fluorite on Matrix (Calcium Fluoride (CaF2)) — mineral

Fluorite on Matrix

Calcium Fluoride (CaF2)

Granite (Granite (composed of Quartz, Felspar, and Mica)) — igneous

Granite

Granite (composed of Quartz, Felspar, and Mica)

Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

Fluorite (Fluorite (Calcium Fluoride - CaF2)) — mineral

Fluorite

Fluorite (Calcium Fluoride - CaF2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Limonite / Ironstone (Limonite (Hydrated Iron Oxide) - FeO(OH)·nH2O) — mineral

Limonite / Ironstone

Limonite (Hydrated Iron Oxide) - FeO(OH)·nH2O

Clear Quartz Crystal (Quartz (Silicon Dioxide, SiO2)) — mineral

Clear Quartz Crystal

Quartz (Silicon Dioxide, SiO2)

Quartz (Citrine or Iron-Stained) (Silicon Dioxide (SiO2)) — mineral

Quartz (Citrine or Iron-Stained)

Silicon Dioxide (SiO2)

Red Jasper (Silicon Dioxide (SiO2) with Hematite inclusions) — sedimentary

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Limonite / Ironstone Nodule (Limonite (Hydrated iron(III) oxide-hydroxide), FeO(OH)·nH2O) — mineral

Limonite / Ironstone Nodule

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

Jasper Geode (Silicon Dioxide (SiO2) with impurities) — sedimentary

Jasper Geode

Silicon Dioxide (SiO2) with impurities

Granite (Phaneritic Felsic Igneous Rock) — igneous

Granite

Phaneritic Felsic Igneous Rock

Carnelian Agate (Silicon Dioxide (SiO2) with Hematite inclusions) — mineral

Carnelian Agate

Silicon Dioxide (SiO2) with Hematite inclusions

Brown Jasper / River Siltstone (Silicon Dioxide (SiO2) with iron oxide impurities) — sedimentary

Brown Jasper / River Siltstone

Silicon Dioxide (SiO2) with iron oxide impurities

Northern Shoveler Duck (Note: This is a biological specimen, not a rock) (Spatula clypeata) — not a rock (biological/ornithological)

Northern Shoveler Duck (Note: This is a biological specimen, not a rock)

Spatula clypeata

not a rock (biological/ornithological)

Gold Ore (Native Gold (Au) in Quartz or Silicate matrix) — mineral

Gold Ore

Native Gold (Au) in Quartz or Silicate matrix

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Diamond (Carbon (C)) — mineral

Diamond

Carbon (C)

Marble (Recrystallized Calcite (CaCO3)) — metamorphic

Marble

Recrystallized Calcite (CaCO3)

Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

Granite (Phaneritic) (Granite (Plutonic Igneous Rock)) — igneous

Granite (Phaneritic)

Granite (Plutonic Igneous Rock)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Basalt (Extrusive Mafic Igneous Rock) — igneous

Basalt

Extrusive Mafic Igneous Rock

Jasper (Multi-color Chert) (Silicon Dioxide (SiO2) with impurities) — sedimentary

Jasper (Multi-color Chert)

Silicon Dioxide (SiO2) with impurities

Chert (Smooth River Stone) (Microcrystalline or cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Smooth River Stone)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Citrine (Silicon Dioxide (SiO2)) — mineral

Citrine

Silicon Dioxide (SiO2)

Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

Siltstone or Fine-grained Sandstone pebble (Siltstone (primarily SiO2 with clay minerals)) — sedimentary

Siltstone or Fine-grained Sandstone pebble

Siltstone (primarily SiO2 with clay minerals)

Limestone (Sedimentary Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Sedimentary Calcium Carbonate (CaCO3)

Shale (Argillite / Shaly Mudstone) — sedimentary

Shale

Argillite / Shaly Mudstone