Rock Identifier

Category

Sedimentary Rock (Cryptocrystalline Quartz)

Browse sedimentary rock (cryptocrystalline quartz) specimens identified by the Rock Identifier community.

Learn about Sedimentary Rock (Cryptocrystalline Quartz) in the encyclopedia

Quartz Schist

Clear Quartz

Tourmalinated Quartz

Tourmalinated Quartz

Rutilated Quartz

Rutilated Quartz

Rock Gypsum

Quartz Arenite

Milky Quartz

Smoky Quartz

Scepter Quartz

Spirit Quartz

Lemon Quartz

Tangerine Quartz

Tangerine Quartz

Thunderegg (Agate or Quartz Geode) (Silica-filled rhyolitic nodule (SiO2)) — sedimentary

Thunderegg (Agate or Quartz Geode)

Silica-filled rhyolitic nodule (SiO2)

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

Jasper (Zebra Jasper)

Silicon Dioxide (SiO2) with impurities

Fossiliferous Flint / Chert (Microcrystalline quartz (SiO2) with embedded invertebrate fossils) — sedimentary

Fossiliferous Flint / Chert

Microcrystalline quartz (SiO2) with embedded invertebrate fossils

Chert (includes Flint & Jasper) (Chert (Siliceous sedimentary rock, chemical formula SiO2)) — sedimentary

Chert (includes Flint & Jasper)

Chert (Siliceous sedimentary rock, chemical formula SiO2)

Red Jasper (Silicon Dioxide (SiO2) with Iron Oxide inclusions) — sedimentary

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Blue Agate Geode (Dyed) (Cryptocrystalline Quartz (SiO2)) — mineral

Blue Agate Geode (Dyed)

Cryptocrystalline Quartz (SiO2)

Chert (containing Quartz/Chalcedony) (Silicon Dioxide (SiO2)) — sedimentary

Chert (containing Quartz/Chalcedony)

Silicon Dioxide (SiO2)

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

Flint (Chert)

Silicon Dioxide (SiO2)

Petrified Wood (Silicified wood (primarily SiO2)) — sedimentary

Petrified Wood

Silicified wood (primarily SiO2)

Chert (Green variety) (Microcrystalline Opaline/Quartz (SiO2)) — sedimentary

Chert (Green variety)

Microcrystalline Opaline/Quartz (SiO2)

Polished brecciated jasper bracelet (Jasper, microcrystalline quartz (SiO₂), commonly with hematite and iron-oxide inclusions) — gemstone

Polished brecciated jasper bracelet

Jasper, microcrystalline quartz (SiO₂), commonly with hematite and iron-oxide inclusions

Yellow Jasper (Silicon Dioxide (SiO2) with iron hydroxides (Goethite/Limonite)) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with iron hydroxides (Goethite/Limonite)

Weathered quartz-rich rock, likely chert or silicified limestone (Microcrystalline quartz (chalcedony, SiO₂), possibly with calcite (CaCO₃) and iron oxides) — sedimentary

Weathered quartz-rich rock, likely chert or silicified limestone

Microcrystalline quartz (chalcedony, SiO₂), possibly with calcite (CaCO₃) and iron oxides

Red jasper (likely polished/tumbled) (Microcrystalline quartz, SiO₂, colored mainly by hematite/goethite) — mineral

Red jasper (likely polished/tumbled)

Microcrystalline quartz, SiO₂, colored mainly by hematite/goethite

Tumbled brown stone, likely jasper or fine-grained quartzite (Uncertain; probable microcrystalline quartz (SiO₂), possibly ferruginous jasper) — sedimentary or metamorphic

Tumbled brown stone, likely jasper or fine-grained quartzite

Uncertain; probable microcrystalline quartz (SiO₂), possibly ferruginous jasper

sedimentary or metamorphic

Polished yellow-brown jasper (Jasper, a microcrystalline variety of quartz (SiO₂), commonly containing iron-oxide impurities) — mineral

Polished yellow-brown jasper

Jasper, a microcrystalline variety of quartz (SiO₂), commonly containing iron-oxide impurities

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

Chert (Quartz Variety)

Silicon Dioxide (SiO2)

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

Banded Chert (Jasper)

Silicon Dioxide (SiO2)

Red jasper in a gray host rock (likely jasperized volcanic rock) (Microcrystalline quartz (SiO₂), iron-oxide–colored jasper, in a fine-grained volcanic or sedimentary matrix) — metamorphic

Red jasper in a gray host rock (likely jasperized volcanic rock)

Microcrystalline quartz (SiO₂), iron-oxide–colored jasper, in a fine-grained volcanic or sedimentary matrix

Shale or Siltstone (Fine-grained siliciclastic sedimentary rock) — sedimentary

Shale or Siltstone

Fine-grained siliciclastic sedimentary rock

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

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Tumbled yellow jasper or chert (Microcrystalline quartz (SiO₂), likely iron-stained jasper/chert) — mineral

Tumbled yellow jasper or chert

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

Chert (with Chalky Cortex) (Silicon Dioxide (SiO2)) — sedimentary

Chert (with Chalky Cortex)

Silicon Dioxide (SiO2)

Chert nodules in Limestone (Microcrystalline Quartz (SiO2) in Calcium Carbonate (CaCO3) matrix) — sedimentary

Chert nodules in Limestone

Microcrystalline Quartz (SiO2) in Calcium Carbonate (CaCO3) matrix

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

Chert (Jasper)

Silicon Dioxide (SiO2)

Tumbled red jasper and related pebbles (Jasper, a microcrystalline variety of quartz (SiO₂), commonly containing hematite/goethite and other iron oxides) — mineral

Tumbled red jasper and related pebbles

Jasper, a microcrystalline variety of quartz (SiO₂), commonly containing hematite/goethite and other iron oxides

Banded chert or jasper (Microcrystalline quartz (SiO₂), with iron-oxide impurities) — sedimentary

Banded chert or jasper

Microcrystalline quartz (SiO₂), with iron-oxide impurities

Polished banded jasper (Jasper, microcrystalline quartz (SiO₂) with iron-oxide inclusions) — mineral

Polished banded jasper

Jasper, microcrystalline quartz (SiO₂) with iron-oxide inclusions

Tumbled brecciated jasper (Microcrystalline quartz (SiO₂), commonly with iron oxides and contrasting breccia fragments) — mineral

Tumbled brecciated jasper

Microcrystalline quartz (SiO₂), commonly with iron oxides and contrasting breccia fragments

Quartz (chalcedony variety) or Limestone with Quartz Veins (SiO2 (for Quartz/Chalcedony); CaCO3 (for Limestone)) — Mineral or Sedimentary Rock (with mineral inclusions)

Quartz (chalcedony variety) or Limestone with Quartz Veins

SiO2 (for Quartz/Chalcedony); CaCO3 (for Limestone)

Mineral or Sedimentary Rock (with mineral inclusions)

Vein-filled Porphyry or Brecciated Jasper Pebble (Brecciated volcanic rock with quartz/calcite veins) — igneous

Vein-filled Porphyry or Brecciated Jasper Pebble

Brecciated volcanic rock with quartz/calcite veins

Agate Geode (Silicon Dioxide (SiO2) - variety Chalcedony/Quartz) — sedimentary

Agate Geode

Silicon Dioxide (SiO2) - variety Chalcedony/Quartz

Banded Agate (Polished Slice) (Chalcedony (cryptocrystalline Quartz), SiO2) — mineral

Banded Agate (Polished Slice)

Chalcedony (cryptocrystalline Quartz), SiO2

Chert (or Ironstone Nodule) (Silicon Dioxide (SiO2) or Limonite-stained Cryptocrystalline Quartz) — sedimentary

Chert (or Ironstone Nodule)

Silicon Dioxide (SiO2) or Limonite-stained Cryptocrystalline Quartz

Polished red jasper (Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides) — mineral

Polished red jasper

Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides

Jasper (specifically Bloodstone or Heliotrope variety) (Silicon Dioxide (SiO2) with iron oxide inclusions) — sedimentary (chemically precipitated)

Jasper (specifically Bloodstone or Heliotrope variety)

Silicon Dioxide (SiO2) with iron oxide inclusions

sedimentary (chemically precipitated)

Mixed Rock Collection (Polylithic Geological Specimen Mix) — sedimentary and igneous

Mixed Rock Collection

Polylithic Geological Specimen Mix

sedimentary and igneous

Jasper Breccia (Brecciated Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2)) — sedimentary

Jasper Breccia

Brecciated Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2)

Jasper and Quartzite Pebble (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary/metamorphic

Jasper and Quartzite Pebble

Silicon Dioxide (SiO2) - Microcrystalline Quartz

sedimentary/metamorphic

Chert with Quartz/Calcite Vein (Microcrystalline Silica (SiO2)) — sedimentary

Chert with Quartz/Calcite Vein

Microcrystalline Silica (SiO2)

Blue Chalcedony (Silicon Dioxide (SiO2)) — mineral

Blue Chalcedony

Silicon Dioxide (SiO2)

Polished Jasper (Cryptocrystalline quartz, SiO2) — mineral

Polished Jasper

Cryptocrystalline quartz, SiO2