Chert (or Flint)
Mocrocrystalline Quartz (SiO2)
sedimentary
Category
Sedimentary Rock (Technically Chert, A Microcrystalline Quartz)
Browse sedimentary rock (technically chert, a microcrystalline quartz) specimens identified by the Rock Identifier community.
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Chert (Flint)
Cryptocrystalline quartz (SiO2)
sedimentary
Chert (Flint)
Cryptocrystalline Quartz (SiO2)
sedimentary
Red Quartzite (Ferruginous Quartz)
Quartzite (SiO2 with Fe2O3 inclusions)
metamorphic
Botryoidal Chalcedony with Iron Staining
Microcrystalline Quartz (SiO2)
mineral
Chert (Pink variety/Jasper)
Silicon Dioxide (SiO2)
sedimentary
Chalcedony or Chert/Jasper with secondary mineral staining
SiO2 (for chalcedony/quartz) with possible secondary copper minerals (e.g., CuSiO3·nH2O for chrysocolla, Cu2(CO3)(OH)2 for malachite) or iron oxides/hydroxides.
Mineral, potentially a rock with chalcedony/jasper.
Chert (Jasper/Flint variety)
Silicon Dioxide (SiO2)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Sandstone (Quartzose)
Arenite (Siliciclastic sedimentary rock)
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (Flint)
Microcrystalline silica (SiO2)
sedimentary
Chert (Beach Pebble)
Silicon Dioxide (SiO2)
sedimentary
Quartz (likely Clear Quartz or Rock Crystal)
Quartz (SiO2)
Mineral
Sandstone (Quartzose Sandstone)
Arenite (primarily SiO2)
sedimentary
Quartz
Silicon Dioxide (SiO2)
Mineral
Pebble (likely a type of sandstone or quartzite pebble)
Clastic Sediment (specifically, a rudite-sized clast). If the pebble is composed of a specific rock type, its scientific name would be that rock type (e.g., 'Quartzite pebble', 'Granite pebble', 'Chert pebble'). Given its appearance, it is likely a metamorphic quartzite pebble or a hard sandstone pebble.
Sedimentary rock
Chert (Black Chert/Flint)
Silicon Dioxide (SiO2)
sedimentary
Hag Stone
Perforated Flint or Chert (SiO2)
sedimentary
Shale with Siltstone layering
Sedimentary Clastic Rock (Mudstone/Shale)
sedimentary
Chert (Black Chert or Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (Black Chert/Flint)
Silicon Dioxide (SiO2)
sedimentary
Sandstone
Arenite (SiO2 based with quartz grains)
sedimentary
Chert pebble
Microcrystalline silica (SiO2)
sedimentary
Chert (and Flint)
Microcrystalline Silica (SiO2)
sedimentary
Chert (Gravel)
Microcrystalline silica (SiO2)
sedimentary
Chert (containing fossil leaf impression)
Microcrystalline silicon dioxide (SiO2)
sedimentary
Chert (Jasper/Quartzite river stone)
Microcrystalline Silicon Dioxide (SiO2)
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Sandstone with Manganese Dendrites
Clastic Sedimentary Rock (SiO2 based with MnO2 inclusions)
sedimentary
Milky Quartz
Quartz (SiO2)
mineral
Yellow Quartzite (River Pebble)
Quartzite (mainly SiO2)
metamorphic
Obsidian
Volcanic glass (high silica content based on SiO2)
igneous
Chert (specifically Pink Chert or Jasperized Chert)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
sedimentary
Dalmatian Stone
Peralkaline Quartz-Feldspar Porphyry with Arfvedsonite
igneous
Red Jasper
Jasper (SiO2 with Fe2O3 inclusions)
sedimentary
Sandstone (likely Quartzose)
Sandstone (Principally SiO2)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Chert (Jasper/Agate variety)
Silicon Dioxide (SiO2)
sedimentary
Yellow Quartzite (Iron-stained)
Quartzite (primarily SiO2 with Fe2O3 staining)
metamorphic
Sandstone
Arenite (primarily SiO2)
sedimentary
Quartz / Common Opal
Silicon Dioxide (SiO2)
mineral