Chert (Flint)
Chert (Silicon Dioxide, SiO2)
sedimentary
Category
Organic (Anthropogenic)
Browse organic (anthropogenic) specimens identified by the Rock Identifier community.
Quartzite with Chert inclusions
Metamorphosed Quartz-rich Rock (SiO2)
metamorphic
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Chert (or Flint)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Common Opal variant)
Silicon Dioxide (SiO2)
sedimentary
Gneiss
High-grade foliated metamorphic rock
metamorphic
Chert (often referred to as Flint or Jasper when pigmented)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) within Sedimentary/Metamorphic Matrix
Metamorphic or Igneous (context dependent)
Quartz / Quartzite
Silicon Dioxide (SiO2)
metamorphic
Mookaite Jasper
Radiolarite (Chert/Jasper variety), formula SiO2
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Chert (and/or Siltstone River Pebble)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Granite
Granite (Phaneritic intrusive igneous rock)
igneous
Mica Schist
Medium-grade regional metamorphic rock (composition varies)
metamorphic
Greenstone
Greenschist
metamorphic
Chert (specifically Flint or Jasper variant)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (with Fossiliferous Silicification)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Gold-Bearing Quartz
Auriferous Quartz (SiO2 with native Au)
Mineral
Chert (Iron-stained)
Chert (SiO2 - Silicon Dioxide)
sedimentary
Chert (varieties include Flint and Jasper)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Hag Stone
Perforated Sedimentary Rock (typically Limestone or Sandstone)
sedimentary
Red Quartzite Slipper Stone
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Chert
Chert (Microcrystalline Silica, SiO2)
sedimentary
Jasper (specifically Chert/Ironstone)
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
sedimentary
Limestone
Calcium Carbonate (primarily CaCO3 as Calcite or Aragonite)
sedimentary
Granite
Phaneritic plutonic rock (composed of Quartz, Feldspar, and Mica/Amphibole)
igneous
Almandine Garnet in Schist
Almandine, Fe3Al2(SiO4)3
metamorphic
Chert (Gravel)
Chert (Cryptocrystalline silicon dioxide, SiO2)
sedimentary
Chert (Arrowhead Fragment)
Chert / Microcrystalline Silicon Dioxide (SiO2)
sedimentary
Quartzite with Gneissic Banding
Quartzite (primarily SiO2) with mafic mineral inclusions
metamorphic
Granite
Granite (Phaneritic intrusive igneous rock; primarily SiO2 and Al2O3)
igneous
Chert (Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Quartz (Vein Quartz)
Silicon Dioxide (SiO2)
mineral
Red Jasper (Chert)
Silicon dioxide (SiO2) with iron oxide inclusions
sedimentary
Chert (Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (with small quartz inclusion)
Microcrystalline Silica (SiO2)
sedimentary
Greenschist (Chlorite Schist)
Greenschist (containing chlorite, actinolite, and epidote)
metamorphic
Chert (Flinty variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Gold Ore in Quartz/Schist
Auriferous Quartz and Sulfide-bearing Schist
Metamorphic/Igneous (Hydrothermal)
Granite
Phaneritic plutonic rock (primarily Quartz, Alkali Feldspar, and Plagioclase)
igneous