Rock Identifier

Category

Organic Mineraloid And Mineral

Browse organic mineraloid and mineral specimens identified by the Rock Identifier community.

Chert (and/or Flint) (Microcrystalline or cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (and/or Flint)

Microcrystalline or cryptocrystalline Quartz (SiO2)

sedimentary
Chert (specifically Flint or Jasper variant) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (specifically Flint or Jasper variant)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

sedimentary
Petrified Wood (Silicified Wood (primarily SiO₂ - Silicon Dioxide)) — metamorphic

Petrified Wood

Silicified Wood (primarily SiO₂ - Silicon Dioxide)

metamorphic
Pyrite (Iron Pyrite (FeS2)) — mineral

Pyrite

Iron Pyrite (FeS2)

mineral
Graphite (Graphite (Carbon, C)) — Mineral

Graphite

Graphite (Carbon, C)

Mineral
Pink Opal / Peruvian Opal (Hydrated amorphous silicon dioxide (SiO2·nH2O)) — Mineral

Pink Opal / Peruvian Opal

Hydrated amorphous silicon dioxide (SiO2·nH2O)

Mineral
Chert (specifically Gray/Blue Chert) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (specifically Gray/Blue Chert)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

sedimentary
Chert (with Quartz vein) (Chert (Silicon Dioxide, SiO2)) — sedimentary

Chert (with Quartz vein)

Chert (Silicon Dioxide, SiO2)

sedimentary
Dyed Blue Agate (Dragon Vein Agate) (Silicon Dioxide (SiO2) with artificial cobalt/organic dyes) — mineral

Dyed Blue Agate (Dragon Vein Agate)

Silicon Dioxide (SiO2) with artificial cobalt/organic dyes

mineral
Chert (Jasper variation) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Chert (Jasper variation)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

sedimentary
Chert (Jasper/Common Opal transition) (Microcrystalline Quartz (SiO2) with iron oxide inclusions) — sedimentary

Chert (Jasper/Common Opal transition)

Microcrystalline Quartz (SiO2) with iron oxide inclusions

sedimentary
Concrete Fragment (Hardened Portland cement and mineral aggregate) — sedimentary (anthropogenic)

Concrete Fragment

Hardened Portland cement and mineral aggregate

sedimentary (anthropogenic)
Chert (Nodule) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Nodule)

Silicon Dioxide (SiO2)

sedimentary
Chert (Nodular) (Chert (SiO2 - Microcrystalline Quartz)) — sedimentary

Chert (Nodular)

Chert (SiO2 - Microcrystalline Quartz)

sedimentary
Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

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

Milky Quartz

Silicon Dioxide (SiO2)

mineral
Granite (Phaneritic Intrusive Igneous Rock (composed primarily of Quartz, Feldspar, and Mica)) — igneous

Granite

Phaneritic Intrusive Igneous Rock (composed primarily of Quartz, Feldspar, and Mica)

igneous
Druzy Quartz Geode (Silicon Dioxide (SiO2)) — mineral

Druzy Quartz Geode

Silicon Dioxide (SiO2)

mineral
Green Fluorite (Fluorite (Calcium Fluoride, CaF2)) — mineral

Green Fluorite

Fluorite (Calcium Fluoride, CaF2)

mineral
Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

mineral
Slag (Industrial Glassy Byproduct) (Ferro-silicate Slag) — Anthropogenic / Non-Natural

Slag (Industrial Glassy Byproduct)

Ferro-silicate Slag

Anthropogenic / Non-Natural
Pyrite in Quartz (Drill Core) (Silicon Dioxide (SiO2) with Iron Sulfide (FeS2) inclusions) — igneous/metamorphic (hydrothermal)

Pyrite in Quartz (Drill Core)

Silicon Dioxide (SiO2) with Iron Sulfide (FeS2) inclusions

igneous/metamorphic (hydrothermal)
Milky Quartz (Quartz Vein) (Silicon Dioxide (SiO2)) — mineral

Milky Quartz (Quartz Vein)

Silicon Dioxide (SiO2)

mineral
Fluorite (Rainbow or Multi-colored Fluorite) (Fluorite (Calcium Fluoride - CaF2)) — mineral

Fluorite (Rainbow or Multi-colored Fluorite)

Fluorite (Calcium Fluoride - CaF2)

mineral
Chert Pebble (Jasper variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert Pebble (Jasper variety)

Microcrystalline Quartz (SiO2)

sedimentary
Green Slag Glass (Amorphous Silica Glass (Anthropogenic)) — Industrial byproduct (often mistaken for obsidian or mineral)

Green Slag Glass

Amorphous Silica Glass (Anthropogenic)

Industrial byproduct (often mistaken for obsidian or mineral)
Shale (Shale (clastic sedimentary rock)) — Sedimentary

Shale

Shale (clastic sedimentary rock)

Sedimentary
Graphite (Graphite (Native Carbon, C)) — metamorphic

Graphite

Graphite (Native Carbon, C)

metamorphic
Jasper (Jasper (Silica-rich microcrystalline Quartz, SiO2 with Fe2O3 impurities)) — sedimentary

Jasper

Jasper (Silica-rich microcrystalline Quartz, SiO2 with Fe2O3 impurities)

sedimentary
Chert (Flint variety) (Chert (Microcrystalline or Cryptocrystalline Quartz), SiO2) — sedimentary

Chert (Flint variety)

Chert (Microcrystalline or Cryptocrystalline Quartz), SiO2

sedimentary
Fossil Shark Tooth (Otodus obliquus) (Otodus obliquus; hydroxyapatite (mineralized form Ca5(PO4)3(OH))) — sedimentary (fossiliferous)

Fossil Shark Tooth (Otodus obliquus)

Otodus obliquus; hydroxyapatite (mineralized form Ca5(PO4)3(OH))

sedimentary (fossiliferous)
Diorite (Intrusive Igneous Diorite) — igneous

Diorite

Intrusive Igneous Diorite

igneous
Fossilized Gastropod (Snail) (Class Gastropoda (internal mold or 'steinkern')) — sedimentary

Fossilized Gastropod (Snail)

Class Gastropoda (internal mold or 'steinkern')

sedimentary
Shale (Shale (fine-grained clastic sedimentary rock)) — Sedimentary

Shale

Shale (fine-grained clastic sedimentary rock)

Sedimentary
Shale (Clastic sedimentary rock (primarily clay and silt minerals)) — sedimentary

Shale

Clastic sedimentary rock (primarily clay and silt minerals)

sedimentary
Slate (Slate (Foliated metamorphic rock)) — metamorphic

Slate

Slate (Foliated metamorphic rock)

metamorphic
Sandstone (Quartz Sandstone (predominantly)) — Sedimentary

Sandstone

Quartz Sandstone (predominantly)

Sedimentary
Opalite (Synthetic Opalised Glass) — Mineral (Synthetic / Man-made)

Opalite

Synthetic Opalised Glass

Mineral (Synthetic / Man-made)
Blue Chalcedony (Microcrystalline Quartz (SiO2)) — mineral

Blue Chalcedony

Microcrystalline Quartz (SiO2)

mineral
Shale with Plant Fossils / Carbonaceous Shale (Laminated Mudrock (Siliciclastic)) — sedimentary

Shale with Plant Fossils / Carbonaceous Shale

Laminated Mudrock (Siliciclastic)

sedimentary
Shale (Mudstone (composed primarily of clay minerals like kaolinite, illite, and smectite, with quartz and calcite)) — sedimentary

Shale

Mudstone (composed primarily of clay minerals like kaolinite, illite, and smectite, with quartz and calcite)

sedimentary
Septarian Nodule (Dragon Stone) (Septarian Nodule (Calcium Carbonate/Aragonite/Calcite Concretion)) — sedimentary

Septarian Nodule (Dragon Stone)

Septarian Nodule (Calcium Carbonate/Aragonite/Calcite Concretion)

sedimentary