Rock Identifier

Category

Sedimentary (Secondary Classification: Cryptocrystalline Quartz)

Browse sedimentary (secondary classification: cryptocrystalline quartz) specimens identified by the Rock Identifier community.

Learn about Sedimentary (Secondary Classification: Cryptocrystalline Quartz) in the encyclopedia

Cactus Quartz

Chalcedony

Black Onyx

Quartzite Sandstone

Quartzite Sandstone

Sandstone

Landscape Agate

Landscape Agate

Tube Agate

Sweetwater Agate

Sweetwater Agate

Frost Agate

Coldwater Agate

Honey Agate

Zebra Agate

Polished jasper or chert pebble (Microcrystalline quartz (SiO₂), likely iron- and clay-rich jasper/chert) — sedimentary

Polished jasper or chert pebble

Microcrystalline quartz (SiO₂), likely iron- and clay-rich jasper/chert

Polished jasper or chert nodule (Microcrystalline quartz (SiO₂), likely iron-stained jasper/chert) — sedimentary

Polished jasper or chert nodule

Microcrystalline quartz (SiO₂), likely iron-stained jasper/chert

Sandstone (with Iron Staining) (Clastic Sedimentary Rock (primarily Quartz, SiO2)) — sedimentary

Sandstone (with Iron Staining)

Clastic Sedimentary Rock (primarily Quartz, SiO2)

Yellow Jasper (Silicon dioxide (SiO2)) — sedimentary

Yellow Jasper

Silicon dioxide (SiO2)

Likely tumbled jasper or iron-rich chert (Microcrystalline quartz (SiO₂), possibly colored by iron oxides) — mineral

Likely tumbled jasper or iron-rich chert

Microcrystalline quartz (SiO₂), possibly colored by iron oxides

Quartz pebble (Agate / Chalcedony) (Silicon Dioxide (SiO2)) — mineral

Quartz pebble (Agate / Chalcedony)

Silicon Dioxide (SiO2)

Shiva Lingam (Cryptocrystalline Quartz (Jasper/Agate)) — sedimentary

Shiva Lingam

Cryptocrystalline Quartz (Jasper/Agate)

Agate (Grey Agate Slice) (Microcrystalline Quartz (SiO2)) — mineral

Agate (Grey Agate Slice)

Microcrystalline Quartz (SiO2)

Quartz Geode (Crystalline Quartz (Silicon Dioxide, SiO2)) — mineral

Quartz Geode

Crystalline Quartz (Silicon Dioxide, SiO2)

Chert (often colloquially called Flint) (Microcrystalline or cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (often colloquially called Flint)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Celestite (Celestine) (Strontium Sulfate (SrSO4)) — mineral

Celestite (Celestine)

Strontium Sulfate (SrSO4)

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

Chert (Jasper)

Microcrystalline Quartz (SiO2)

Banded Slate or Siltstone with Quartz/Calcite Veins (Protolith-derived Siltstone or Slate (varies based on degree of metamorphism)) — metamorphic

Banded Slate or Siltstone with Quartz/Calcite Veins

Protolith-derived Siltstone or Slate (varies based on degree of metamorphism)

Red Jasper (SiO2 (Silicon Dioxide) with Fe2O3 (Hematite)) — sedimentary

Red Jasper

SiO2 (Silicon Dioxide) with Fe2O3 (Hematite)

Ironstone Matrix with Jasper / Chert (Ferruginous Chert / Limonitic Jasper (SiO2 with Fe-oxides)) — sedimentary

Ironstone Matrix with Jasper / Chert

Ferruginous Chert / Limonitic Jasper (SiO2 with Fe-oxides)

Chalcedony (Silicon Dioxide (SiO2)) — mineral

Chalcedony

Silicon Dioxide (SiO2)

Red Jasper (Silicon Dioxide (SiO2) with Hematite impurities) — sedimentary

Red Jasper

Silicon Dioxide (SiO2) with Hematite impurities

Carnelian (Carnelian (Silicon Dioxide - SiO2)) — mineral

Carnelian

Carnelian (Silicon Dioxide - SiO2)

Blue Chalcedony (Agate) (Silicon Dioxide (SiO2)) — mineral

Blue Chalcedony (Agate)

Silicon Dioxide (SiO2)

Jasper (Silicon Dioxide (SiO2) with impurities, microcrystalline quartz) — sedimentary

Jasper

Silicon Dioxide (SiO2) with impurities, microcrystalline quartz

Amygdaloidal Basalt (Extrusive Igneous Rock with Amygdules) — igneous

Amygdaloidal Basalt

Extrusive Igneous Rock with Amygdules

Sandstone (with Limonite staining) (Arenite (FeOx-rich)) — sedimentary

Sandstone (with Limonite staining)

Arenite (FeOx-rich)

Jasper (Red/Carnelian Agate) (Silicon Dioxide (SiO2) with Iron Oxide impurities) — mineral

Jasper (Red/Carnelian Agate)

Silicon Dioxide (SiO2) with Iron Oxide impurities

Jasper with Quartz Vein (Silicon Dioxide (SiO2)) — sedimentary

Jasper with Quartz Vein

Silicon Dioxide (SiO2)

Quartz Geode (Silicon Dioxide (SiO2)) — mineral

Quartz Geode

Silicon Dioxide (SiO2)

Banded Chert / Cryptocrystalline Quartz (Silicon Dioxide (SiO2)) — sedimentary

Banded Chert / Cryptocrystalline Quartz

Silicon Dioxide (SiO2)

Blue calcite (likely) (Calcite, calcium carbonate (CaCO₃)) — mineral

Blue calcite (likely)

Calcite, calcium carbonate (CaCO₃)

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

Yellow Quartzite (or Quartz River Pebble)

Silicon Dioxide (SiO2)

Sandstone (Iron-stained) (Arenite (primarily SiO2 with Fe2O3 staining)) — sedimentary

Sandstone (Iron-stained)

Arenite (primarily SiO2 with Fe2O3 staining)

Carnelian Agate (Silicon dioxide (SiO2) with iron impurities) — mineral

Carnelian Agate

Silicon dioxide (SiO2) with iron impurities

K2 Jasper (K2 Granite) (Azurite in Granite (Biotite Granite with Azurite inclusions)) — igneous

K2 Jasper (K2 Granite)

Azurite in Granite (Biotite Granite with Azurite inclusions)

Ferruginous Quartz (Iron-stained Quartz) (Silicon Dioxide (SiO2) with Hematite/Goethite inclusions) — mineral

Ferruginous Quartz (Iron-stained Quartz)

Silicon Dioxide (SiO2) with Hematite/Goethite inclusions

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

Quartz Pebble (Chalcedony / River Pebble)

Silicon Dioxide (SiO2)

Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

Carnelian (Chalcedony (SiO2)) — mineral

Carnelian

Chalcedony (SiO2)

Tumbled yellowish quartz or chalcedony (Quartz/chalcedony, SiO₂) — mineral

Tumbled yellowish quartz or chalcedony

Quartz/chalcedony, SiO₂

Limonite / Ironstone (FeO(OH)·nH2O) — sedimentary

Limonite / Ironstone

FeO(OH)·nH2O

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

Chert (often called Flint)

Chert (Cryptocrystalline Quartz, SiO2)

Jasper (Chalcedony (Microcrystalline Quartz) - SiO2) — sedimentary or metamorphic

Jasper

Chalcedony (Microcrystalline Quartz) - SiO2

sedimentary or metamorphic

Chert Arrowhead (Projectile Point) (Chert (Cryptocrystalline Quartz, SiO2)) — sedimentary

Chert Arrowhead (Projectile Point)

Chert (Cryptocrystalline Quartz, SiO2)

Quartz Geode (Silicon Dioxide (SiO2) in Geode form) — sedimentary

Quartz Geode

Silicon Dioxide (SiO2) in Geode form

Banded Sedimentary Rock (Sedimentary rock with Liesegang banding) — sedimentary

Banded Sedimentary Rock

Sedimentary rock with Liesegang banding