Rock Identifier

Category

Sedimentary Rock (Technically A Microcrystalline Quartz Mineral Aggregate)

Browse sedimentary rock (technically a microcrystalline quartz mineral aggregate) specimens identified by the Rock Identifier community.

Learn about Sedimentary Rock (Technically A Microcrystalline Quartz Mineral Aggregate) in the encyclopedia

Chert

Kiwi Jasper

Coal

Flower Jasper

Feather Jasper

Claystone

Shale

Dendritic Jasper

Sandstone

Zebra Jasper

Siltstone

Bumblebee Jasper

Bumblebee Jasper

Chert (Chert Nodule with Chalky Cortex) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Chert (Chert Nodule with Chalky Cortex)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Chalcedony (Agate / Moss Agate) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Agate / Moss Agate)

Silicon Dioxide (SiO2)

Chert (specifically Banded Chert) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (specifically Banded Chert)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Tumbled brown jasper (Microcrystalline quartz (SiO₂), commonly with iron-oxide impurities) — mineral

Tumbled brown jasper

Microcrystalline quartz (SiO₂), commonly with iron-oxide impurities

Chert (specifically Jasper or Brown Chert node) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (specifically Jasper or Brown Chert node)

Microcrystalline Quartz (SiO2)

Chalcedony with Quartz (Silicon Dioxide (SiO2)) — mineral

Chalcedony with Quartz

Silicon Dioxide (SiO2)

Chert Breccia (Brecciated Microcrystalline Quartz (SiO2)) — sedimentary

Chert Breccia

Brecciated Microcrystalline Quartz (SiO2)

Geode with Quartz and possibly Jasper/Hematite (Quartz (SiO2) and Chalcedony (cryptocrystalline SiO2), possibly stained by iron oxides) — Mineral/Sedimentary Geode

Geode with Quartz and possibly Jasper/Hematite

Quartz (SiO2) and Chalcedony (cryptocrystalline SiO2), possibly stained by iron oxides

Mineral/Sedimentary Geode

Smelter Slag (Anthropogenic Silicate Slag) — igneous

Smelter Slag

Anthropogenic Silicate Slag

Jasper / Quartz Pebble (Silicon Dioxide (SiO2) with microcrystalline impurities) — sedimentary

Jasper / Quartz Pebble

Silicon Dioxide (SiO2) with microcrystalline impurities

Chert (specifically Flint) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (specifically Flint)

Microcrystalline quartz (SiO2)

Anthracite coal (Anthracite; predominantly carbon (C), with minor mineral impurities) — sedimentary

Anthracite coal

Anthracite; predominantly carbon (C), with minor mineral impurities

Chert (Smooth River Pebble) (Microcrystalline or cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Smooth River Pebble)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Purple Chalcedony (Silicon Dioxide (SiO2)) — mineral

Purple Chalcedony

Silicon Dioxide (SiO2)

Chert (Brown Variety) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Brown Variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert Concretion (Microcrystalline Quartz (SiO2)) — sedimentary

Chert Concretion

Microcrystalline Quartz (SiO2)

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

Chert (Flint / Chalcedony variety)

Microcrystalline Quartz (SiO2)

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

Polished ocean jasper (orbicular jasper) (Microcrystalline quartz/chalcedony with iron oxides and accessory minerals; SiO₂-dominant) — sedimentary

Polished ocean jasper (orbicular jasper)

Microcrystalline quartz/chalcedony with iron oxides and accessory minerals; SiO₂-dominant

Weathered quartz-rich river stone (Chert or silicified limestone/quartzite; exact identification requires testing) — sedimentary

Weathered quartz-rich river stone

Chert or silicified limestone/quartzite; exact identification requires testing

Chert (and Fossiliferous Chert) (Silicon Dioxide (SiO2)) — sedimentary

Chert (and Fossiliferous Chert)

Silicon Dioxide (SiO2)

Bandit Heart Pebble (Quartz-Veined Sedimentary Rock) (Quartz-veined siltstone or sandstone) — sedimentary

Bandit Heart Pebble (Quartz-Veined Sedimentary Rock)

Quartz-veined siltstone or sandstone

Snowflake Obsidian (Vitreous Volcanic Rock (Amorphous Silicate), SiO2) — igneous

Snowflake Obsidian

Vitreous Volcanic Rock (Amorphous Silicate), SiO2

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

Chert (specifically brown Chert or Jasper)

Microcrystalline Quartz (SiO2)

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Green Aventurine (Quartz with Fuchsite inclusions (SiO2)) — mineral

Green Aventurine

Quartz with Fuchsite inclusions (SiO2)

Chert (with Liesegang Banding) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (with Liesegang Banding)

Microcrystalline quartz (SiO2)

Brecciated Jasper (Polished) (Silicon Dioxide (SiO2) with Iron Oxide Impurities) — sedimentary

Brecciated Jasper (Polished)

Silicon Dioxide (SiO2) with Iron Oxide Impurities

Tumbled jasper or chert (Microcrystalline quartz (SiO₂), likely opaque chalcedony/jasper) — mineral

Tumbled jasper or chert

Microcrystalline quartz (SiO₂), likely opaque chalcedony/jasper

Agate (Crazy Lace or Eye Agate) (Silicon Dioxide (SiO2)) — mineral

Agate (Crazy Lace or Eye Agate)

Silicon Dioxide (SiO2)

Chert (Field Stone) (Microcrystalline / Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Field Stone)

Microcrystalline / Cryptocrystalline Quartz (SiO2)

Chert Cobble / Quartzite River Stone (Microcrystalline Quartz (SiO2) / Quartzite) — sedimentary

Chert Cobble / Quartzite River Stone

Microcrystalline Quartz (SiO2) / Quartzite

Siltstone with Fossil Cast (Sedimentary Rock (Siltstone / Fine-grained Sandstone)) — sedimentary

Siltstone with Fossil Cast

Sedimentary Rock (Siltstone / Fine-grained Sandstone)

Chert (River Pebble) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (River Pebble)

Microcrystalline Quartz (SiO2)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

Sandstone pebble (Sandstone (mainly Quartz, SiO2)) — sedimentary

Sandstone pebble

Sandstone (mainly Quartz, SiO2)

Jasper and Chert Conglomerate (Ferruginous Microcrystalline Quartz (SiO2)) — sedimentary

Jasper and Chert Conglomerate

Ferruginous Microcrystalline Quartz (SiO2)

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

Chert (White Chert)

Silicon Dioxide (SiO2)

Chert (specifically Pink/Tan Chert) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (specifically Pink/Tan Chert)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Dalmation Stone (Peralkaline Rock (mixed silicate minerals)) — igneous

Dalmation Stone

Peralkaline Rock (mixed silicate minerals)

Jasper (likely Brecciated or Multi-colored) (Jasper (SiO2)) — sedimentary

Jasper (likely Brecciated or Multi-colored)

Jasper (SiO2)