Rock Identifier

Category

Mineral Precipitate (Anthropogenic Context)

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

Amethyst (Quartz (Silicon Dioxide with iron impurities), SiO2) — mineral

Amethyst

Quartz (Silicon Dioxide with iron impurities), SiO2

Quartz (Smoky Quartz variant) (Silicon Dioxide (SiO2)) — mineral

Quartz (Smoky Quartz variant)

Silicon Dioxide (SiO2)

Amethyst (Quartz variety) (Silicon Dioxide (SiO2) with iron impurities) — mineral

Amethyst (Quartz variety)

Silicon Dioxide (SiO2) with iron impurities

Zoisite with Ruby / Anyolite (Anyolite (Ca2Al3(SiO4)3(OH) with Chromian Zoisite and Tschermakite inclusions)) — metamorphic

Zoisite with Ruby / Anyolite

Anyolite (Ca2Al3(SiO4)3(OH) with Chromian Zoisite and Tschermakite inclusions)

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

Hematite

Iron(III) oxide (Fe2O3)

N/A (The provided image is a storyboard/digital document) — N/A

N/A (The provided image is a storyboard/digital document)

Sandstone (Arenite (SiO2 based with mineral cement)) — sedimentary

Sandstone

Arenite (SiO2 based with mineral cement)

Pyrite and Fluorite on Quartz (Matrix Specimen) (Iron Disulfide (FeS2) and Calcium Fluoride (CaF2) with Silicon Dioxide (SiO2)) — mineral

Pyrite and Fluorite on Quartz (Matrix Specimen)

Iron Disulfide (FeS2) and Calcium Fluoride (CaF2) with Silicon Dioxide (SiO2)

Granite Pebble (Granite (Phaneritic intrusive igneous rock comprising Quartz, Feldspar, and Mica)) — igneous

Granite Pebble

Granite (Phaneritic intrusive igneous rock comprising Quartz, Feldspar, and Mica)

Pegmatite (Coarse-grained Igneous Rock (Granitic Pegmatite)) — igneous

Pegmatite

Coarse-grained Igneous Rock (Granitic Pegmatite)

Quartz Geode Fragment (Silicon Dioxide (SiO2)) — mineral

Quartz Geode Fragment

Silicon Dioxide (SiO2)

Quartz (Fieldstone/Pebble) (Silicon Dioxide (SiO2)) — mineral

Quartz (Fieldstone/Pebble)

Silicon Dioxide (SiO2)

Indigo Gabbro (Gabbro (MaFIC intrusive rock)) — igneous

Indigo Gabbro

Gabbro (MaFIC intrusive rock)

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

Blue Lepidolite

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

Quartz (River Pebble) (Silicon Dioxide (SiO2)) — mineral

Quartz (River Pebble)

Silicon Dioxide (SiO2)

Fossiliferous Limestone (Biogenic Limestone (Calcium Carbonate, CaCO3)) — sedimentary

Fossiliferous Limestone

Biogenic Limestone (Calcium Carbonate, CaCO3)

Sandstone (Calcareous Sandstone) (Calcareous Sandstone (primarily SiO2 with CaCO3 cement)) — sedimentary

Sandstone (Calcareous Sandstone)

Calcareous Sandstone (primarily SiO2 with CaCO3 cement)

Charoite (Charoite, K(Ca,Na)2Si4O10(OH,F)·H2O) — metamorphic

Charoite

Charoite, K(Ca,Na)2Si4O10(OH,F)·H2O

Basalt with Quartz/Calcite matrix (Basalt (SiO2 with Ca/Mg/Fe silicates) on a Mineral Matrix) — igneous

Basalt with Quartz/Calcite matrix

Basalt (SiO2 with Ca/Mg/Fe silicates) on a Mineral Matrix

Diamond in Kimberlite (Kimberlite Matrix with Carbon (Diamond)) — igneous

Diamond in Kimberlite

Kimberlite Matrix with Carbon (Diamond)

Granite (Granite) — Igneous

Granite

Granite

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Bornite (Peacock Ore) (Bornite (Cu5FeS4)) — mineral

Bornite (Peacock Ore)

Bornite (Cu5FeS4)

Pyrite (Iron Disulfide (FeS2)) — mineral

Pyrite

Iron Disulfide (FeS2)

Magnetite (likely with weathered Limonite/Hematite) (Magnetite (Fe3O4) with iron oxide weathering) — mineral

Magnetite (likely with weathered Limonite/Hematite)

Magnetite (Fe3O4) with iron oxide weathering

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Rock Salt (Halite) (Halite (Sodium Chloride, NaCl)) — mineral

Rock Salt (Halite)

Halite (Sodium Chloride, NaCl)

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

Quartz (Common or Milky)

Silicon Dioxide (SiO2)

Quartz Veinated Sandstone or Siltstone (Silicon Dioxide (SiO2) within a clastic sedimentary matrix) — sedimentary

Quartz Veinated Sandstone or Siltstone

Silicon Dioxide (SiO2) within a clastic sedimentary matrix

Quartz Pebble (Silicon Dioxide (SiO2)) — Mineral / Sedimentary occurrence

Quartz Pebble

Silicon Dioxide (SiO2)

Mineral / Sedimentary occurrence

Orthoclase Feldspar (Salmon variety) (Orthoclase, KAlSi3O8) — mineral

Orthoclase Feldspar (Salmon variety)

Orthoclase, KAlSi3O8

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz (Microcrystalline/Macro crystalline variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Microcrystalline/Macro crystalline variety)

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Orthoclase Feldspar (KAlSi3O8 (Potassium aluminum silicate)) — mineral

Orthoclase Feldspar

KAlSi3O8 (Potassium aluminum silicate)

Quartz (specifically Quartzite or Massive Quartz) (Silicon Dioxide (SiO2)) — Mineral

Quartz (specifically Quartzite or Massive Quartz)

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz (Iron-stained) (Silicon Dioxide (SiO2)) — mineral

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Blue Apatite (Fluorapatite (Ca5(PO4)3F)) — mineral

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

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

Quartz (Milky or Smoky Quartz)

Silicon Dioxide (SiO2)