Rock Identifier

Category

Sedimentary (Silica Rich Mineral Variety)

Browse sedimentary (silica rich mineral variety) specimens identified by the Rock Identifier community.

Botryoidal Chalcedony (Agate/Desert Rose Chalcedony) (Silicon Dioxide (SiO2) - Cryptocrystalline Quartz) — mineral

Botryoidal Chalcedony (Agate/Desert Rose Chalcedony)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Fire Agate (Rough) (Silicon Dioxide (SiO2) - Variety of Chalcedony) — mineral

Fire Agate (Rough)

Silicon Dioxide (SiO2) - Variety of Chalcedony

Sandstone with Secondary Mineral Encrustation (Arenite with Silica/Calcite deposits (SiO2 or CaCO3)) — sedimentary

Sandstone with Secondary Mineral Encrustation

Arenite with Silica/Calcite deposits (SiO2 or CaCO3)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Banded Agate (Onyx type) (Silicon Dioxide (SiO2) - Cryptocrystalline Quartz) — mineral

Banded Agate (Onyx type)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Amethyst (variety of Quartz) (SiO2 (Silicon Dioxide) with trace iron impurities) — Mineral

Amethyst (variety of Quartz)

SiO2 (Silicon Dioxide) with trace iron impurities

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

Quartz (Milky Quartz)

Silicon Dioxide (SiO₂)

Agate with Quartz Druzy (Silicon Dioxide (SiO2) - Microcrystalline and Macrocrystalline varieties) — mineral

Agate with Quartz Druzy

Silicon Dioxide (SiO2) - Microcrystalline and Macrocrystalline varieties

Chert (specifically Gray/Black Chert) (Chert (Microcrystalline or Cryptocrystalline Quartz, SiO2)) — sedimentary

Chert (specifically Gray/Black Chert)

Chert (Microcrystalline or Cryptocrystalline Quartz, SiO2)

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

Chert (Chert / Flint nodule)

Silicon Dioxide (SiO2)

Ferruginous Quartz (Iron-stained Quartz) (Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions) — mineral

Ferruginous Quartz (Iron-stained Quartz)

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions

Quartz Crystal with Inclusions (Silicon Dioxide (SiO2)) — mineral

Quartz Crystal with Inclusions

Silicon Dioxide (SiO2)

Geode (Chert or Quartz Nodule) (Silicon Dioxide (SiO2)) — sedimentary

Geode (Chert or Quartz Nodule)

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO₂)) — Mineral

Quartz

Silicon Dioxide (SiO₂)

Banded Agate (Cryptocrystalline Quartz (SiO2)) — mineral

Banded Agate

Cryptocrystalline Quartz (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Carnelian Agate (Silicon Dioxide (SiO2) - Variety: Chalcedony) — mineral

Carnelian Agate

Silicon Dioxide (SiO2) - Variety: Chalcedony

Blue Quartz (Dumortierite Quartz) (Quartz (SiO2) with inclusions of Dumortierite (Al7(BO3)(SiO4)3O3)) — mineral

Blue Quartz (Dumortierite Quartz)

Quartz (SiO2) with inclusions of Dumortierite (Al7(BO3)(SiO4)3O3)

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

Chert (Jasper variation)

Silicon dioxide (SiO2)

Fossilized Dinosaur Skull (Tyrannosaurus rex) (Tyrannosaurus rex (permineralized fossil), rich in Hydroxylapatite/Silica) — sedimentary

Fossilized Dinosaur Skull (Tyrannosaurus rex)

Tyrannosaurus rex (permineralized fossil), rich in Hydroxylapatite/Silica

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

Chert (Flint)

Silicon Dioxide (SiO2)

Quartz (likely Clear Quartz or Rock Crystal) (Quartz (SiO2)) — Mineral

Quartz (likely Clear Quartz or Rock Crystal)

Quartz (SiO2)

Quartz Geode Fragment (Silicon Dioxide (SiO2)) — mineral

Quartz Geode Fragment

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Banded Iron Formation (BIF) / Tiger Iron variety (Banded Iron Formation (composed primarily of Magnetite Fe3O4, Hematite Fe2O3, and Chert/Quartz SiO2)) — sedimentary

Banded Iron Formation (BIF) / Tiger Iron variety

Banded Iron Formation (composed primarily of Magnetite Fe3O4, Hematite Fe2O3, and Chert/Quartz SiO2)

White Quartz (Silicon Dioxide (SiO2)) — mineral

White Quartz

Silicon Dioxide (SiO2)

Jasper and Agate (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper and Agate

Microcrystalline Quartz (SiO2)

Carnelian Agate (Silicon Dioxide (SiO2) - Carnelian variety of Chalcedony) — Mineral

Carnelian Agate

Silicon Dioxide (SiO2) - Carnelian variety of Chalcedony

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Moss Agate (Chalcedony (SiO2) with inclusions of manganese or iron oxide) — mineral

Moss Agate

Chalcedony (SiO2) with inclusions of manganese or iron oxide

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

Chert (specifically Flint or Jasper variant)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Quartz Pebble (Milky and Gray) (Quartz (Silicon Dioxide, SiO2)) — mineral

Quartz Pebble (Milky and Gray)

Quartz (Silicon Dioxide, SiO2)

Quartz (Iron-Stained) (Silicon Dioxide (SiO2)) — mineral

Quartz (Iron-Stained)

Silicon Dioxide (SiO2)

Quartz Vein in Siltstone (SiO2 (Quartz) on clastic sedimentary matrix) — sedimentary

Quartz Vein in Siltstone

SiO2 (Quartz) on clastic sedimentary matrix

Dendritic Agate (Tumbled) (Silicon Dioxide (SiO2) with inclusions) — mineral

Dendritic Agate (Tumbled)

Silicon Dioxide (SiO2) with inclusions

Rose Quartz Druzy (Silicon Dioxide (SiO2)) — mineral

Rose Quartz Druzy

Silicon Dioxide (SiO2)

Chert (Common Opal/Jasper variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Common Opal/Jasper variety)

Microcrystalline Quartz (SiO2)

Banded Agate (specifically Mexican Lace Agate variety appearance) (Silicon Dioxide (SiO2 / Chalcedony)) — mineral

Banded Agate (specifically Mexican Lace Agate variety appearance)

Silicon Dioxide (SiO2 / Chalcedony)

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

Jasper (specifically Red Jasper)

Silicon Dioxide (SiO2) with iron oxide inclusions

Greywacke (River Pebble) (Greywacke sandstone with quartz veining) — sedimentary

Greywacke (River Pebble)

Greywacke sandstone with quartz veining

Montana Moss Agate (Chalcedony (SiO2) with Manganese/Iron oxide inclusions) — sedimentary

Montana Moss Agate

Chalcedony (SiO2) with Manganese/Iron oxide inclusions

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)