Rock Identifier

Category

Anthropogenic (Man Made Material Processed By Nature)

Browse anthropogenic (man made material processed by nature) specimens identified by the Rock Identifier community.

Learn about Anthropogenic (Man Made Material Processed By Nature) in the encyclopedia

Opalite

Goldstone

Blue Goldstone

Dunite

Zincite

Emerald Crystal

Emerald Crystal

Orange Obsidian

Diamond

Lavender Obsidian

Electric Blue Obsidian

Tripolite

Violet Obsidian

Polished red banded stone, likely rhodonite (Rhodonite — manganese inosilicate, MnSiO₃; possibly rhodochrosite or dyed quartz) — mineral

Polished red banded stone, likely rhodonite

Rhodonite — manganese inosilicate, MnSiO₃; possibly rhodochrosite or dyed quartz

Quartzite (Metamorphic Rock (Mainly SiO2)) — metamorphic

Quartzite

Metamorphic Rock (Mainly SiO2)

Diamond (Carbon (C)) — mineral

Diamond

Carbon (C)

Diamond (in a gold setting) (Carbon (C)) — mineral

Diamond (in a gold setting)

Carbon (C)

Turquoise (CuAl6(PO4)4(OH)8·4H2O (Hydrous copper aluminium phosphate)) — mineral

Turquoise

CuAl6(PO4)4(OH)8·4H2O (Hydrous copper aluminium phosphate)

Diamond (or Diamond Simulant) (Carbon (C) if diamond, various if simulant) — gemstone

Diamond (or Diamond Simulant)

Carbon (C) if diamond, various if simulant

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

Black Jasper

Silicon Dioxide (SiO2) with impurities

Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

Red jasper (tumbled) (Jasper, microcrystalline quartz/chalcedony (SiO₂) colored mainly by iron oxides) — mineral

Red jasper (tumbled)

Jasper, microcrystalline quartz/chalcedony (SiO₂) colored mainly by iron oxides

Tumbled red jasper (Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides) — mineral

Tumbled red jasper

Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides

Diabase (Greenstone) (Diabase (Dolerite)) — igneous

Diabase (Greenstone)

Diabase (Dolerite)

Sandstone (Sandstone (clastic sedimentary rock)) — sedimentary

Sandstone

Sandstone (clastic sedimentary rock)

Quartz Cluster (Likely Ferruginous) (Silicon Dioxide (SiO2)) — mineral

Quartz Cluster (Likely Ferruginous)

Silicon Dioxide (SiO2)

Diamond (or Diamond Simulant) (Carbon (C)) — gemstone

Diamond (or Diamond Simulant)

Carbon (C)

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

Rough Diamond

Diamond (pure Carbon, C)

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

Rough Diamond

Diamond (pure Carbon, C)

Diamond (C) — gemstone

Diamond

C

Granite (Phaneritic Felsic Igneous Rock) — igneous

Granite

Phaneritic Felsic Igneous Rock

Hematite (beads) (Hematite (Fe₂O₃)) — Mineral

Hematite (beads)

Hematite (Fe₂O₃)

Red Sandstone (Arenite (Ferruginous Sandstone)) — sedimentary

Red Sandstone

Arenite (Ferruginous Sandstone)

Pearl (Calcium Carbonate (mostly Aragonite), CaCO3 (with conchiolin)) — mineral

Pearl

Calcium Carbonate (mostly Aragonite), CaCO3 (with conchiolin)

Amber with dark mineral/organic inclusions (Fossilized plant resin (amber; chiefly polymerized diterpenoid resin)) — gemstone

Amber with dark mineral/organic inclusions

Fossilized plant resin (amber; chiefly polymerized diterpenoid resin)

Diamond (C) — gemstone

Diamond

C

Granite (Granite) — Igneous

Granite

Granite

Carnelian Beads (Silicon Dioxide (Variety of Chalcedony), $SiO_2$) — gemstone

Carnelian Beads

Silicon Dioxide (Variety of Chalcedony), $SiO_2$

Polished dendritic agate or jasper (Microcrystalline quartz (SiO₂), likely chalcedony with manganese-oxide dendrites) — mineral

Polished dendritic agate or jasper

Microcrystalline quartz (SiO₂), likely chalcedony with manganese-oxide dendrites

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

Limonite (Iron Ore)

Limonite (FeO(OH)·nH2O)

Emerald (Rough) (Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)) — mineral

Emerald (Rough)

Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)

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

Green Jasper

Silicon Dioxide (SiO2) with impurities

Hag Stone (Perforated Sedimentary Rock (typically Limestone or Sandstone)) — sedimentary

Hag Stone

Perforated Sedimentary Rock (typically Limestone or Sandstone)

Diamond (Cut Gemstone) (Carbon (C)) — mineral

Diamond (Cut Gemstone)

Carbon (C)

Quartz (Quartz (SiO₂ - Silicon Dioxide)) — Mineral

Quartz

Quartz (SiO₂ - Silicon Dioxide)

Shale (Shale (clay-sized silicate minerals)) — sedimentary

Shale

Shale (clay-sized silicate minerals)

Polished agate slice (Agate, a banded variety of chalcedony (microcrystalline SiO₂)) — mineral

Polished agate slice

Agate, a banded variety of chalcedony (microcrystalline SiO₂)

Tumbled jasper or quartzite pebble (Jasper (microcrystalline quartz, SiO₂), possibly iron-stained quartzite) — metamorphic

Tumbled jasper or quartzite pebble

Jasper (microcrystalline quartz, SiO₂), possibly iron-stained quartzite

Sandstone (Arenite (primarily SiO2 with trace Fe2O3)) — sedimentary

Sandstone

Arenite (primarily SiO2 with trace Fe2O3)

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

Petrified Wood

Silicified Wood (primarily SiO2)

Quartz-rich rock, possibly milky quartz or quartzite (Quartz (silicon dioxide, SiO₂); if granular and foliated, likely quartzite) — mineral

Quartz-rich rock, possibly milky quartz or quartzite

Quartz (silicon dioxide, SiO₂); if granular and foliated, likely quartzite

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

Chert (Flint Nodules)

Silicon Dioxide (SiO2)

Diamond (Carbon (C)) — mineral

Diamond

Carbon (C)

Smoky Quartz Cluster (Smoky Quartz (Silicon Dioxide - SiO2)) — mineral

Smoky Quartz Cluster

Smoky Quartz (Silicon Dioxide - SiO2)

Diamond (Set in Jewelry) (Carbon (C)) — gemstone

Diamond (Set in Jewelry)

Carbon (C)