Rock Identifier

Category

Sedimentary (Formed From Silica Deposits)

Browse sedimentary (formed from silica deposits) specimens identified by the Rock Identifier community.

Learn about Sedimentary (Formed From Silica Deposits) in the encyclopedia

Geyserite

Quartzite Sandstone

Quartzite Sandstone

Turbidite

Kambaba Jasper

Tripolite

Sinter

Loess

Ignimbrite

Quartzite

Chert

Coal

Silcrete

Jasper (Microcrystalline Quartz (SiO2) with iron oxide impurities) — sedimentary

Jasper

Microcrystalline Quartz (SiO2) with iron oxide impurities

Fossil Shark Tooth (Otodus sp. or Carcharocles sp. (likely fossilized Chondrichthyes)) — fossil

Fossil Shark Tooth

Otodus sp. or Carcharocles sp. (likely fossilized Chondrichthyes)

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

Chert (Jasper/Agate variety)

Microcrystalline Quartz (SiO2)

Opal (Hydrated silica (SiO2 · nH2O)) — mineraloid

Opal

Hydrated silica (SiO2 · nH2O)

Fossilized Echinoid (Sea Urchin) or Brachiopod (Echinoidea / Invertebrate Fossil) — fossil

Fossilized Echinoid (Sea Urchin) or Brachiopod

Echinoidea / Invertebrate Fossil

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

Chert (Flint variety)

Silicon Dioxide (SiO2)

River Gravel (Quartzite and Chert pebbles) (Silicon Dioxide (SiO2)) — sedimentary

River Gravel (Quartzite and Chert pebbles)

Silicon Dioxide (SiO2)

Agate (Turtle Carving) (Agate (Cryptocrystalline variety of Silica, SiO2)) — mineral

Agate (Turtle Carving)

Agate (Cryptocrystalline variety of Silica, SiO2)

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

Chert (Jasper/Flint variety)

Silicon Dioxide (SiO2)

Red Jasper (Silicon Dioxide (Microcrystalline Quartz), SiO2) — sedimentary

Red Jasper

Silicon Dioxide (Microcrystalline Quartz), SiO2

Milky quartz pebble (Quartz (silicon dioxide, SiO₂)) — mineral

Milky quartz pebble

Quartz (silicon dioxide, SiO₂)

Leopard Skin Jasper (Microcrystalline Quartz (SiO2) with mineral impurities) — sedimentary

Leopard Skin Jasper

Microcrystalline Quartz (SiO2) with mineral impurities

Rounded quartz-rich pebble, likely quartzite or chert (Quartzite (mostly microcrystalline SiO₂); exact identification requires hardness and acid tests) — metamorphic

Rounded quartz-rich pebble, likely quartzite or chert

Quartzite (mostly microcrystalline SiO₂); exact identification requires hardness and acid tests

Sandstone (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone

Arenite (composed primarily of SiO2)

Chert (Silicon dioxide (SiO2)) — sedimentary

Chert

Silicon dioxide (SiO2)

Milky quartz (likely quartz vein fragment) (Quartz, silicon dioxide (SiO₂)) — mineral

Milky quartz (likely quartz vein fragment)

Quartz, silicon dioxide (SiO₂)

Jasper (Microcrystalline Quartz (SiO2)) — mineral

Jasper

Microcrystalline Quartz (SiO2)

Jasper (or possibly Agate/Chalcedony) beads (SiO2 (Silicon Dioxide)) — mineral

Jasper (or possibly Agate/Chalcedony) beads

SiO2 (Silicon Dioxide)

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

Chert (Jasper/Flint variety)

Silicon Dioxide (SiO2)

Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

Jasper (Microcrystalline quartz (SiO2)) — sedimentary

Jasper

Microcrystalline quartz (SiO2)

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

Quartz (Jasper / Chert)

Silicon Dioxide (SiO2)

Red Jasper (Silicon dioxide (SiO2) with iron oxide impurities) — mineral

Red Jasper

Silicon dioxide (SiO2) with iron oxide impurities

Chert (Quartz Variety) (Chert (SiO2)) — sedimentary

Chert (Quartz Variety)

Chert (SiO2)

Fossilized Bryozoan (Phylum Bryozoa) — fossil

Fossilized Bryozoan

Phylum Bryozoa

Yellow Chert (Jasper) (Chalcedony (SiO2) with iron oxide inclusions) — sedimentary

Yellow Chert (Jasper)

Chalcedony (SiO2) with iron oxide inclusions

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

Leopard Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Leopard Jasper

Microcrystalline Quartz (SiO2)

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

Red Jasper (Silicate Chert)

Silicon Dioxide (SiO2) with iron oxide inclusions

Red jasper (likely iron-rich chert) (Microcrystalline quartz, SiO₂, colored mainly by hematite/goethite) — sedimentary

Red jasper (likely iron-rich chert)

Microcrystalline quartz, SiO₂, colored mainly by hematite/goethite

Red Jasper (Microcrystalline quartz (SiO2) with iron oxide impurities) — sedimentary

Red Jasper

Microcrystalline quartz (SiO2) with iron oxide impurities

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

Jasper

Silicon Dioxide (Microcrystalline Quartz, $SiO_2$)

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

Chert (Flint)

Silicon Dioxide (SiO2)

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

Banded Chert / Jasper

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Agate (Silicon dioxide (chalcedony variety), SiO2) — sedimentary

Agate

Silicon dioxide (chalcedony variety), SiO2

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

Quartz (Tumbled)

Silicon Dioxide (SiO2)

Carnelian (Silicon Dioxide (Chalcedony variety), SiO2) — gemstone

Carnelian

Silicon Dioxide (Chalcedony variety), SiO2

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

Chert / Flint

Microcrystalline Quartz (SiO2)

Common Opal (Hydrated Silica (SiO2·nH2O)) — mineral

Common Opal

Hydrated Silica (SiO2·nH2O)

Chalcedony (Yellow Chert / Agate) (Quartz (Silicon Dioxide - SiO2)) — mineral

Chalcedony (Yellow Chert / Agate)

Quartz (Silicon Dioxide - SiO2)

Imperial Jasper (Microcrystalline Quartz (Chalcedony), SiO2) — sedimentary

Imperial Jasper

Microcrystalline Quartz (Chalcedony), SiO2