Rock Identifier

Category

Sedimentary (Microcrystalline Silicate)

Browse sedimentary (microcrystalline silicate) specimens identified by the Rock Identifier community.

Sandstone (likely Fossilized Wood or Concrete Simulacrum) (Arenite / Silicified Wood / Anthropogenic Concrete) — sedimentary

Sandstone (likely Fossilized Wood or Concrete Simulacrum)

Arenite / Silicified Wood / Anthropogenic Concrete

Green Chert (Jasper) (Silicon Dioxide (SiO2)) — sedimentary

Green Chert (Jasper)

Silicon Dioxide (SiO2)

Pink Botswana Agate (Silicon Dioxide (SiO₂), a cryptocrystalline variety of Quartz and Chalcedony) — sedimentary

Pink Botswana Agate

Silicon Dioxide (SiO₂), a cryptocrystalline variety of Quartz and Chalcedony

Chert (containing Flint and Calcareous inclusions) (Silicon Dioxide (SiO2) with Calcium Carbonate (CaCO3) impurities) — sedimentary

Chert (containing Flint and Calcareous inclusions)

Silicon Dioxide (SiO2) with Calcium Carbonate (CaCO3) impurities

Agate (Water-Worn Pebble) (Silicon Dioxide (SiO2) - Chalcedony) — mineral

Agate (Water-Worn Pebble)

Silicon Dioxide (SiO2) - Chalcedony

Dendritic Agate (Dendritic Agate (Silicon Dioxide with Manganese or Iron Oxide inclusions, SiO2)) — mineral

Dendritic Agate

Dendritic Agate (Silicon Dioxide with Manganese or Iron Oxide inclusions, SiO2)

Dendritic Jasper (Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions) — sedimentary

Dendritic Jasper

Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions

Moqui Marble (Shaman Stone) (Iron Oxide Concretion (composed primarily of Quartz sand with Hematite/Goethite shell)) — sedimentary

Moqui Marble (Shaman Stone)

Iron Oxide Concretion (composed primarily of Quartz sand with Hematite/Goethite shell)

Leopard Skin Jasper (Orbicular Rhyolite (Silicon Dioxide with various impurities)) — sedimentary

Leopard Skin Jasper

Orbicular Rhyolite (Silicon Dioxide with various impurities)

Fossiliferous Limestone (Fossiliferous Calclutite / Bio-calcarenite (CaCO3)) — sedimentary

Fossiliferous Limestone

Fossiliferous Calclutite / Bio-calcarenite (CaCO3)

Chert (Jasper) (Microcrystalline Quartz (SiO2) with Iron Oxide inclusions) — sedimentary

Chert (Jasper)

Microcrystalline Quartz (SiO2) with Iron Oxide inclusions

Turquoise (CuAl6(PO4)4(OH)8·4H2O (Hydrous Phosphate of Copper and Aluminum)) — mineral

Turquoise

CuAl6(PO4)4(OH)8·4H2O (Hydrous Phosphate of Copper and Aluminum)

Yellow Jasper (Chalcedony (SiO2) with iron oxide inclusions) — mineral

Yellow Jasper

Chalcedony (SiO2) with iron oxide inclusions

Limestone (specifically Travertine or Tufa) (Calcium Carbonate (CaCO3)) — sedimentary

Limestone (specifically Travertine or Tufa)

Calcium Carbonate (CaCO3)

Quartz (Rock Crystal) with minor impurities (Quartz (SiO2)) — Mineral

Quartz (Rock Crystal) with minor impurities

Quartz (SiO2)

Chert (Chert / Flint) (Silicon dioxide (SiO2) - Microcrystalline quartz) — sedimentary

Chert (Chert / Flint)

Silicon dioxide (SiO2) - Microcrystalline quartz

Chert (Nodule) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Chert (Nodule)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

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

Chert (often called Flint)

Chert (Microcrystalline or Cryptocrystalline Quartz, SiO2)

Chert (varieties include Flint and Jasper) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Chert (varieties include Flint and Jasper)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

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

Chert (White Chert/Flint)

Chert (Microcrystalline or Cryptocrystalline Quartz, SiO2)

Chert (with Fossiliferous Silicification) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Chert (with Fossiliferous Silicification)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Chert (variously Flint) (Chert (Microcrystalline or cryptocrystalline Quartz, SiO₂)) — sedimentary

Chert (variously Flint)

Chert (Microcrystalline or cryptocrystalline Quartz, SiO₂)

Chert (Grey Flint) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Chert (Grey Flint)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Chert (and Flint) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Chert (and Flint)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Chert (White Chert / Flint) (Microcrystalline or Cryptocrystalline Silicon Dioxide (SiO2)) — sedimentary

Chert (White Chert / Flint)

Microcrystalline or Cryptocrystalline Silicon Dioxide (SiO2)

Pink Banded Onyx (Mexican Onyx / Calcite) (Calcite (CaCO3) - microcrystalline calcium carbonate) — sedimentary

Pink Banded Onyx (Mexican Onyx / Calcite)

Calcite (CaCO3) - microcrystalline calcium carbonate

Brecciated Chert (Brecciated Chert (Microcrystalline Quartz, SiO2)) — sedimentary

Brecciated Chert

Brecciated Chert (Microcrystalline Quartz, SiO2)

Limestone (specifically Crushed Limestone/Calcictic) (Calcium Carbonate (CaCO3)) — sedimentary

Limestone (specifically Crushed Limestone/Calcictic)

Calcium Carbonate (CaCO3)

Carnelian (Carnelian (subset of Chalcedony); SiO2 with Iron Oxide impurities) — mineral

Carnelian

Carnelian (subset of Chalcedony); SiO2 with Iron Oxide impurities

Chert (specifically Yellow Jasper) (Sedimentary Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (specifically Yellow Jasper)

Sedimentary Cryptocrystalline Quartz (SiO2)

Limestone (with Iron-Oxide staining) (Sedimentary Calcium Carbonate (CaCO3)) — sedimentary

Limestone (with Iron-Oxide staining)

Sedimentary Calcium Carbonate (CaCO3)

Dyed Agate (Tumbled) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — mineral

Dyed Agate (Tumbled)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Dendritic Agate (Silicon Dioxide (SiO2) with inclusions of manganese or iron oxide) — mineral

Dendritic Agate

Silicon Dioxide (SiO2) with inclusions of manganese or iron oxide

Green Aventurine (Green Quartzite) (Silicon Dioxide (SiO2) with inclusions of Fuchsite mica) — metamorphic

Green Aventurine (Green Quartzite)

Silicon Dioxide (SiO2) with inclusions of Fuchsite mica

Orange Quartzite (Tumbled) (Quartzite (SiO2)) — metamorphic

Orange Quartzite (Tumbled)

Quartzite (SiO2)

Green Aventurine (Silicon Dioxide (SiO2) with Fuchsite inclusions) — metamorphic

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Yellow Quartzite (or Quartz River Pebble) (Silicon Dioxide (SiO2)) — metamorphic

Yellow Quartzite (or Quartz River Pebble)

Silicon Dioxide (SiO2)

Limonite (Iron Ore/Sandstone mixture) (Limonite (FeO(OH)·nH2O) often mixed with Goethite and sedimentary matrix) — mineral

Limonite (Iron Ore/Sandstone mixture)

Limonite (FeO(OH)·nH2O) often mixed with Goethite and sedimentary matrix

Petrified Wood (Silicified Wood (SiO2)) — metamorphic

Petrified Wood

Silicified Wood (SiO2)

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

Banded Iron Formation (BIF)

Banded Iron Formation

Geode (Unopened) (Silica Concretion / Geode (Formula: SiO2 for quartz internal contents)) — sedimentary

Geode (Unopened)

Silica Concretion / Geode (Formula: SiO2 for quartz internal contents)

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

Chert (Jasper)

Silicon Dioxide (SiO2)