Rock Identifier

Category

Organic (Sedimentary Associated)

Browse organic (sedimentary associated) specimens identified by the Rock Identifier community.

Learn about Organic (Sedimentary Associated) in the encyclopedia

Sapropel

Bituminous Shale

Bituminous Shale

Black Shale

Oil Shale

Red Jasper (Microcrystalline Quartz (SiO2) with iron oxide inclusions) — sedimentary

Red Jasper

Microcrystalline Quartz (SiO2) with iron oxide inclusions

Red Jasper (Silicon Dioxide (SiO2) with Iron Oxide inclusions) — sedimentary

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide inclusions

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

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Ferruginous Sandstone (Ironstone) (Sedimentary rock with high iron oxide content (Fe2O3 / FeO(OH))) — sedimentary

Ferruginous Sandstone (Ironstone)

Sedimentary rock with high iron oxide content (Fe2O3 / FeO(OH))

Jasper (Jasper (Silicon Dioxide, SiO2)) — sedimentary

Jasper

Jasper (Silicon Dioxide, SiO2)

Jasper (Silicon dioxide (SiO2) with impurities) — sedimentary

Jasper

Silicon dioxide (SiO2) with impurities

Pyrite-bearing rock (likely pyrite-rich schist or massive pyrite) (Pyrite, FeS₂, possibly in a micaceous metamorphic matrix) — mineral

Pyrite-bearing rock (likely pyrite-rich schist or massive pyrite)

Pyrite, FeS₂, possibly in a micaceous metamorphic matrix

Howlite (Howlite, Ca₂B₅SiO₉(OH)₅) — mineral

Howlite

Howlite, Ca₂B₅SiO₉(OH)₅

Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

Raw Fluorite (Calcium Fluoride (CaF2)) — mineral

Raw Fluorite

Calcium Fluoride (CaF2)

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

Green Fluorite

Fluorite (Calcium Fluoride, CaF2)

Jasper (Chalcedony (SiO2)) — mineral

Jasper

Chalcedony (SiO2)

Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

Slate and shale outcrop (Slate: very low-grade metamorphosed shale, chiefly clay minerals, muscovite/illite, and quartz; associated shale may be present.) — metamorphic

Slate and shale outcrop

Slate: very low-grade metamorphosed shale, chiefly clay minerals, muscovite/illite, and quartz; associated shale may be present.

Yellow Quartz (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz

Silicon Dioxide (SiO2)

Red Agate (Chalcedony (SiO2)) — gemstone

Red Agate

Chalcedony (SiO2)

Gneiss (Foliated Metamorphic Gneiss) — metamorphic

Gneiss

Foliated Metamorphic Gneiss

Galena (Lead Sulfide (PbS)) — mineral

Galena

Lead Sulfide (PbS)

Agate (specifically a small Chalcedony nodule) (Agate (Cryptocrystalline variety of Quartz, SiO2)) — mineral

Agate (specifically a small Chalcedony nodule)

Agate (Cryptocrystalline variety of Quartz, SiO2)

Red Jasper (Jasper (SiO2) with Hematite (Fe2O3) inclusions) — sedimentary (microcrystalline quartz)

Red Jasper

Jasper (SiO2) with Hematite (Fe2O3) inclusions

sedimentary (microcrystalline quartz)

Blue Chalcedony (Silicon Dioxide (SiO2)) — mineral

Blue Chalcedony

Silicon Dioxide (SiO2)

Blue Kyanite (Kyanite (Al2SiO5)) — Mineral

Blue Kyanite

Kyanite (Al2SiO5)

Greenstone (Greywacke or Nephrite Jade variant) (Metamorphosed mafic igneous or sedimentary rock (e.g., Actinolite-Chlorite Schist)) — metamorphic

Greenstone (Greywacke or Nephrite Jade variant)

Metamorphosed mafic igneous or sedimentary rock (e.g., Actinolite-Chlorite Schist)

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

Green Fluorite

Fluorite (Calcium Fluoride, CaF2)

Red Jasper (Quartz (Silicon Dioxide) with Hematite inclusions, SiO2 + Fe2O3) — mineral

Red Jasper

Quartz (Silicon Dioxide) with Hematite inclusions, SiO2 + Fe2O3

Pyrite (Iron Pyrite (FeS2)) — mineral

Pyrite

Iron Pyrite (FeS2)

Petrified Wood (Silicified Wood (SiO2)) — fossil

Petrified Wood

Silicified Wood (SiO2)

Hematite-rich ironstone concretion (Hematite (Fe₂O₃), likely mixed with goethite/limonite and silica) — mineral

Hematite-rich ironstone concretion

Hematite (Fe₂O₃), likely mixed with goethite/limonite and silica

Petrified Wood (Silicified Wood (SiO2)) — fossil

Petrified Wood

Silicified Wood (SiO2)

Halite (Sodium chloride (NaCl)) — mineral

Halite

Sodium chloride (NaCl)

Jasper (Silicon Dioxide (Microcrystalline Quartz, $SiO_2$)) — sedimentary

Jasper

Silicon Dioxide (Microcrystalline Quartz, $SiO_2$)

Chert (often called Flint) (Chert (Cryptocrystalline Quartz, SiO2)) — sedimentary

Chert (often called Flint)

Chert (Cryptocrystalline Quartz, SiO2)

Jasper (Silicon dioxide (SiO2) with iron inclusions) — sedimentary

Jasper

Silicon dioxide (SiO2) with iron inclusions

Green Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Green Jasper

Microcrystalline Quartz (SiO2)

Chert (specifically Silex or Flint) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (specifically Silex or Flint)

Microcrystalline Quartz (SiO2)

Red Jasper (Silicon Dioxide (SiO2) with Iron Oxide inclusions) — mineral

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Shark Tooth Fossil (Vertebrate fossilized tooth) — fossil

Shark Tooth Fossil

Vertebrate fossilized tooth

Red carnelian (red chalcedony) (Carnelian, a microcrystalline variety of quartz (SiO₂), commonly colored by iron oxides) — gemstone

Red carnelian (red chalcedony)

Carnelian, a microcrystalline variety of quartz (SiO₂), commonly colored by iron oxides

Cardstock (Paper) (Cellulose (C6H10O5)n) — sedimentary (man-made)

Cardstock (Paper)

Cellulose (C6H10O5)n

sedimentary (man-made)

Chert (with Limestone/Carbonate matrix) (Sedimentary cryptocrystalline silica (SiO2)) — sedimentary

Chert (with Limestone/Carbonate matrix)

Sedimentary cryptocrystalline silica (SiO2)

Fossilized Bone Fragment (Vertebrate Fossil) — fossil

Fossilized Bone Fragment

Vertebrate Fossil

Sandstone with Algae Growth (Arenite with Chlorophyta/Lichen) — sedimentary

Sandstone with Algae Growth

Arenite with Chlorophyta/Lichen