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

Ignimbrite

Loess

Quartzite

Chert

Coal

Silcrete

Chert (and/or River Pebble) (Microcrystalline silica (SiO2)) — sedimentary

Chert (and/or River Pebble)

Microcrystalline silica (SiO2)

Jasper with Iron Inclusions (Silicon Dioxide (SiO2) with Hematite/Goethite) — sedimentary

Jasper with Iron Inclusions

Silicon Dioxide (SiO2) with Hematite/Goethite

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Polished reddish-brown gemstone, likely carnelian (Carnelian: chalcedony, microcrystalline quartz (SiO₂), colored mainly by iron oxides) — gemstone

Polished reddish-brown gemstone, likely carnelian

Carnelian: chalcedony, microcrystalline quartz (SiO₂), colored mainly by iron oxides

Chert Pebble (Microcrystalline Quartz (SiO2)) — sedimentary

Chert Pebble

Microcrystalline Quartz (SiO2)

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

Chert (Jasper/Agate variety)

Microcrystalline Quartz (SiO2)

Conglomerate (Sedimentary Conglomerate) — sedimentary

Conglomerate

Sedimentary Conglomerate

Agate (Silicon Dioxide (Chalcedony), SiO2) — sedimentary

Agate

Silicon Dioxide (Chalcedony), SiO2

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

Chert (Jasper)

Cryptocrystalline Silicon Dioxide (SiO2)

Tumbled quartz pebble (Quartz (SiO₂), likely massive microcrystalline quartz or quartz-rich chert) — mineral

Tumbled quartz pebble

Quartz (SiO₂), likely massive microcrystalline quartz or quartz-rich chert

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

Chert (Jasper)

Microcrystalline Quartz (SiO2)

Chert or silicified rock fragment (Microcrystalline quartz (SiO₂), likely chert with iron-oxide staining) — sedimentary

Chert or silicified rock fragment

Microcrystalline quartz (SiO₂), likely chert with iron-oxide staining

Jasper / Chert (River Rock) (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper / Chert (River Rock)

Microcrystalline Quartz (SiO2)

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

Chert (Jasper/Chaldcedony)

Silicon Dioxide (SiO2)

Quartz (Common Quartz/Citrine-toned) (Silicon Dioxide (SiO2)) — mineral

Quartz (Common Quartz/Citrine-toned)

Silicon Dioxide (SiO2)

Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

Jasper (Green Jasper/Heliotrope variety) (Silicon Dioxide (SiO2)) — sedimentary

Jasper (Green Jasper/Heliotrope variety)

Silicon Dioxide (SiO2)

Clear Quartz Crystal (Silicon Dioxide (SiO2)) — mineral

Clear Quartz Crystal

Silicon Dioxide (SiO2)

Flint (Chert (SiO2)) — sedimentary

Flint

Chert (SiO2)

Chalcedony (Carnelian Agate) (Cryptocrystalline quartz (SiO2) with Iron Oxide inclusions) — sedimentary

Chalcedony (Carnelian Agate)

Cryptocrystalline quartz (SiO2) with Iron Oxide inclusions

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

Jasper

Silicon Dioxide (SiO2) with impurities

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

Chert or Jasper

Microcrystalline Quartz (SiO2)

Jasper with Quartz vein (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Jasper with Quartz vein

Silicon Dioxide (SiO2) - Microcrystalline Quartz

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

Chert (often called Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

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

Jasper / Chert nodule

Microcrystalline Quartz (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Tumbled Agate (Silicon Dioxide (SiO2)) — mineral

Tumbled Agate

Silicon Dioxide (SiO2)

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

Chert (Jasper)

Microcrystalline Quartz (SiO2)

Echinoid Fossil / Fossilized Sea Urchin (Echinoidea) — fossil

Echinoid Fossil / Fossilized Sea Urchin

Echinoidea

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

Jasper

Silicon Dioxide (Microcrystalline Quartz, SiO2)

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

Chert (Flint)

Silicon Dioxide (SiO2)

Jasper (Silicon dioxide (SiO2)) — Mineral / Sedimentary

Jasper

Silicon dioxide (SiO2)

Mineral / Sedimentary

Botryoidal chalcedony (likely common opal) (Silica, SiO₂; chalcedony is microcrystalline quartz, while opal is hydrated amorphous silica (SiO₂·nH₂O)) — mineral

Botryoidal chalcedony (likely common opal)

Silica, SiO₂; chalcedony is microcrystalline quartz, while opal is hydrated amorphous silica (SiO₂·nH₂O)

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

Red Jasper

Silicon dioxide (SiO2) with iron inclusions

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

Chert (Jasper/Flint variety)

Silicon Dioxide (SiO2)

Jasper Pebble (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper Pebble

Microcrystalline Quartz (SiO2)

Botryoidal Lace Agate (Agate (Silicon Dioxide, SiO2)) — mineral

Botryoidal Lace Agate

Agate (Silicon Dioxide, SiO2)

Jasper (Microcrystalline Quartz (SiO2)) — mineral

Jasper

Microcrystalline Quartz (SiO2)

Chert (Basanite) (Chert (Microcrystalline SiO2)) — sedimentary

Chert (Basanite)

Chert (Microcrystalline SiO2)

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Fancy Jasper (Jasper (Cryptocrystalline Quartz, SiO2)) — sedimentary

Fancy Jasper

Jasper (Cryptocrystalline Quartz, SiO2)

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

Botryoidal Chalcedony (Agate)

Silicon Dioxide (SiO2)