Rock Identifier

Category

Mineral Precipitate (Anthropogenic Context)

Browse mineral precipitate (anthropogenic context) specimens identified by the Rock Identifier community.

Learn about Mineral Precipitate (Anthropogenic Context) in the encyclopedia

Glauconite

Hutcheonite

Halite

Sperrylite

Baddeleyite

Anatase

Brookite

Talc

Euxenite

Eltyubyuite

Buergerite

Dolomite

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Carnelian (Carnelian Chalcedony (SiO2 with Hematite impurities)) — mineral

Carnelian

Carnelian Chalcedony (SiO2 with Hematite impurities)

Hematite (Iron(III) oxide (Fe2O3)) — Mineral

Hematite

Iron(III) oxide (Fe2O3)

Quartz (Drusy/Crystalline variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Drusy/Crystalline variety)

Silicon Dioxide (SiO2)

Hematite (Iron(III) oxide (Fe2O3)) — mineral

Hematite

Iron(III) oxide (Fe2O3)

Quartz-veined Sedimentary Rock (Sedimentary rock with hydrothermal quartz veins) — sedimentary

Quartz-veined Sedimentary Rock

Sedimentary rock with hydrothermal quartz veins

Chert (Flint / Jasper / Hornstone) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Flint / Jasper / Hornstone)

Microcrystalline Quartz (SiO2)

Copper Nugget (Native Copper (Cu)) — mineral

Copper Nugget

Native Copper (Cu)

Quartz Druze (Crystalline Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz Druze (Crystalline Quartz)

Silicon Dioxide (SiO2)

Geode (Unopened) (Quartz Geode (SiO2) / Chalcedony Concretion) — mineral

Geode (Unopened)

Quartz Geode (SiO2) / Chalcedony Concretion

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

Green Aventurine

Quartz (Silicon Dioxide, SiO2) with fuchsite inclusions

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

Green Aventurine

Quartz (Silicon Dioxide, SiO2) with fuchsite inclusions

Yellow Ocher (Limonite) (Limonite (Hydrated Iron Oxide) - FeO(OH)·nH2O) — mineral

Yellow Ocher (Limonite)

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

Druzy Quartz (on Quartzite or Chert) (Silicon Dioxide (SiO2)) — mineral

Druzy Quartz (on Quartzite or Chert)

Silicon Dioxide (SiO2)

Calcite (Calcium Carbonate (CaCO3)) — mineral

Calcite

Calcium Carbonate (CaCO3)

Banded Iron Formation (Banded Iron Formation (BIF)) — sedimentary

Banded Iron Formation

Banded Iron Formation (BIF)

Slag (Anthropogenic Glass/Iron byproduct) (Ferro-silicate Slag) — Anthropogenic (Man-made)

Slag (Anthropogenic Glass/Iron byproduct)

Ferro-silicate Slag

Anthropogenic (Man-made)

Gold Nugget (Gold (Au)) — mineral

Gold Nugget

Gold (Au)

Obsidian Arrowhead (Volcanic Glass (Primary composition: SiO2)) — igneous

Obsidian Arrowhead

Volcanic Glass (Primary composition: SiO2)

Green Chalcedony (Batu Akik) (Silicon Dioxide (SiO2)) — gemstone

Green Chalcedony (Batu Akik)

Silicon Dioxide (SiO2)

Jasper Pebble (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper Pebble

Microcrystalline Quartz (SiO2)

Sandstone (with Iron Oxide) (Quartz Arenite / Ferruginous Sandstone (SiO2 with Fe2O3)) — sedimentary

Sandstone (with Iron Oxide)

Quartz Arenite / Ferruginous Sandstone (SiO2 with Fe2O3)

Chalcedony with Druzy Quartz Geode (Silicon Dioxide (SiO2)) — mineral

Chalcedony with Druzy Quartz Geode

Silicon Dioxide (SiO2)

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

Chert (Flint)

Silicon Dioxide (SiO2)

Tiger's Eye (often misinterpreted as Gold Ore in this context) (Pseudomorph of Quartz after Crocidolite (SiO2)) — metamorphic

Tiger's Eye (often misinterpreted as Gold Ore in this context)

Pseudomorph of Quartz after Crocidolite (SiO2)

Chert (often called Flint in this context) (Silicon Dioxide (SiO2)) — sedimentary

Chert (often called Flint in this context)

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Geode (Silicon Dioxide (SiO2)) — mineral

Quartz Geode

Silicon Dioxide (SiO2)

Quartz (Milky or Smoky Quartz variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky or Smoky Quartz variety)

Silicon Dioxide (SiO2)

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Specular Hematite (Hematite (Iron Oxide, Fe2O3)) — mineral

Specular Hematite

Hematite (Iron Oxide, Fe2O3)

Moonstone (Orthoclase (Potassium Feldspar) - (K,Na)AlSi3O8) — mineral

Moonstone

Orthoclase (Potassium Feldspar) - (K,Na)AlSi3O8

Optical Calcite (Calcium Carbonate (CaCO3)) — mineral

Optical Calcite

Calcium Carbonate (CaCO3)

Druzzy Quartz on Matrix (Silicon Dioxide (SiO2)) — mineral

Druzzy Quartz on Matrix

Silicon Dioxide (SiO2)

Bloodstone (Heliotrope (Chalcedony)) — mineral

Bloodstone

Heliotrope (Chalcedony)

Quartz (Rose or Milky) (Silicon Dioxide (SiO2)) — mineral

Quartz (Rose or Milky)

Silicon Dioxide (SiO2)

Quartz Drusy on Matrix (Silicon Dioxide (SiO2)) — mineral

Quartz Drusy on Matrix

Silicon Dioxide (SiO2)

Crystalline Quartz (Rough) (Quartz (Silicon Dioxide, SiO2)) — mineral

Crystalline Quartz (Rough)

Quartz (Silicon Dioxide, SiO2)

Vein-filled Porphyry or Brecciated Jasper Pebble (Brecciated volcanic rock with quartz/calcite veins) — igneous

Vein-filled Porphyry or Brecciated Jasper Pebble

Brecciated volcanic rock with quartz/calcite veins

Red Agate Sphere (or Banded Jasper/Agate) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — mineral

Red Agate Sphere (or Banded Jasper/Agate)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Small quartz crystal cluster (likely druzy quartz) (Quartz, silicon dioxide (SiO₂)) — mineral

Small quartz crystal cluster (likely druzy quartz)

Quartz, silicon dioxide (SiO₂)

Quartz Vein / Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz Vein / Milky Quartz

Silicon Dioxide (SiO2)