Rock Identifier

Category

Organic (Zoogenic)

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

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

Chert (specifically Flint or Jasper variant)

Microcrystalline quartz (SiO2)

Chert (specifically White Chert or Novaculite) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Chert (specifically White Chert or Novaculite)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Chert (variations include Flint/Chalcedony) (Chert (SiO2 - Silicon Dioxide)) — sedimentary

Chert (variations include Flint/Chalcedony)

Chert (SiO2 - Silicon Dioxide)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Fossil Rugose Coral (Horn Coral) (Order Rugosa (likely Grewingkia or Heliophyllum species); Calcium Carbonate (CaCO3)) — sedimentary

Fossil Rugose Coral (Horn Coral)

Order Rugosa (likely Grewingkia or Heliophyllum species); Calcium Carbonate (CaCO3)

Mookaite Jasper (Silicon Dioxide (SiO2) - Radiolarite) — sedimentary

Mookaite Jasper

Silicon Dioxide (SiO2) - Radiolarite

Chert (Flint) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Flint)

Microcrystalline Quartz (SiO2)

Greyling Sandstone / Greywacke (Lithic Wacke (SiO2 + diverse mineral fragments)) — sedimentary

Greyling Sandstone / Greywacke

Lithic Wacke (SiO2 + diverse mineral fragments)

Yellow Quartzite (River Pebble) (Quartzite (mainly SiO2)) — metamorphic

Yellow Quartzite (River Pebble)

Quartzite (mainly SiO2)

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

Chert (and Flint variant)

Silicon Dioxide (SiO2)

Chert (or Flint) (Mocrocrystalline Quartz (SiO2)) — sedimentary

Chert (or Flint)

Mocrocrystalline Quartz (SiO2)

Chert (Nodular) (Microcrystalline Silica (SiO2)) — sedimentary

Chert (Nodular)

Microcrystalline Silica (SiO2)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Chert (and Limestone) (Silicon Dioxide (SiO2)) — sedimentary

Chert (and Limestone)

Silicon Dioxide (SiO2)

Riverstone Quartzite (Quartzite (primarily SiO2)) — metamorphic

Riverstone Quartzite

Quartzite (primarily SiO2)

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

Chert (Flint)

Chert (Silicon Dioxide, SiO2)

Fossiliferous Limestone (Coquina / Shell Limestone) (Biogenic Limestone (Calcium Carbonate, CaCO3)) — sedimentary

Fossiliferous Limestone (Coquina / Shell Limestone)

Biogenic Limestone (Calcium Carbonate, CaCO3)

Chert (potentially Flint or Mudstone) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (potentially Flint or Mudstone)

Microcrystalline Quartz (SiO2)

Garnetiferous Pegmatite (Pegmatite with Almandine Garnet and Muscovite) — igneous

Garnetiferous Pegmatite

Pegmatite with Almandine Garnet and Muscovite

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

Chert (Flint)

Silicon Dioxide (SiO2)

Granite (Granite (Mainly Quartz, Alkali Feldspar, and Plagioclase)) — igneous

Granite

Granite (Mainly Quartz, Alkali Feldspar, and Plagioclase)

Chert (Jasper/Agate variety) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (Jasper/Agate variety)

Microcrystalline quartz (SiO2)

Chert (Jasper variation) (Silicon dioxide (SiO2)) — sedimentary

Chert (Jasper variation)

Silicon dioxide (SiO2)

Chert (and Flint) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (and Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Banded) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Banded)

Microcrystalline Quartz (SiO2)

Quartzite Pebble (Metamorphosed Quartz Sandstone (SiO2)) — metamorphic

Quartzite Pebble

Metamorphosed Quartz Sandstone (SiO2)

Chert (Field-collected specimen) (Chert (Crystalline Silica, SiO2)) — sedimentary

Chert (Field-collected specimen)

Chert (Crystalline Silica, SiO2)

Diorite (Diorite) — igneous

Diorite

Diorite

Obsidian and Green Calcite (Volcanic Glass and Calcium Carbonate (CaCO3)) — igneous and sedimentary/mineral

Obsidian and Green Calcite

Volcanic Glass and Calcium Carbonate (CaCO3)

igneous and sedimentary/mineral

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

Chert (Flint)

Silicon Dioxide (SiO2)

Schist (Mica Schist (Medium-grade metamorphic rock)) — metamorphic

Schist

Mica Schist (Medium-grade metamorphic rock)

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

Chert / Flint

Silicon Dioxide (SiO2)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Yellow Chert or Jasper (Silicon Dioxide (SiO2)) — sedimentary

Yellow Chert or Jasper

Silicon Dioxide (SiO2)

Yellow Jasper (Chert variant) (Silicon Dioxide (SiO2) with iron oxide inclusions) — sedimentary

Yellow Jasper (Chert variant)

Silicon Dioxide (SiO2) with iron oxide inclusions

Mookaite Jasper (Silicified Radiolarite (SiO2)) — sedimentary

Mookaite Jasper

Silicified Radiolarite (SiO2)

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Garnet-Bearing Schist (Almandine Garnet Micaceous Schist) — metamorphic

Garnet-Bearing Schist

Almandine Garnet Micaceous Schist

Quartzite Pebble (Quartzite (mostly SiO2)) — metamorphic

Quartzite Pebble

Quartzite (mostly SiO2)

Chert Nodule (Microcrystalline Quartz (SiO2)) — sedimentary

Chert Nodule

Microcrystalline Quartz (SiO2)