Sedimentary (Chemically Precipitated Mineral)

Browse sedimentary (chemically precipitated mineral) specimens identified by the Rock Identifier community.

Chert (often called Flint or Jasper)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

sedimentary

Chert / Flint

Silicon Dioxide (SiO2)

sedimentary

Chert (Flint)

Microcrystalline Quartz (SiO2)

sedimentary

Chert (specifically Flint or Novaculite variant)

Chert (Microcrystalline Quartz, SiO2)

sedimentary

Chert (containing Iron Oxide spots)

Microcrystalline Quartz (SiO2)

sedimentary

Chert (River Pebble)

Microcrystalline Quartz (SiO2)

sedimentary

Chert (Flint)

Chert (Cryptocrystalline Quartz, SiO2)

sedimentary

Chert (Jasper/Flint variety)

Silicon Dioxide (SiO2)

sedimentary

Chert (Flint variety)

Chert (SiO2)

sedimentary

Chert (Chert / Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

sedimentary

Chert (Lightly weathered variety)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

sedimentary

Chert / Flint

Silicon Dioxide (SiO₂)

sedimentary

Chert (variously known as Flint or River Pebble)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

sedimentary

Chert (Nodule)

Silicon Dioxide (SiO2)

sedimentary

Chert (Flint)

Microcrystalline Quartz (SiO2)

sedimentary

Chert (Flint)

Microcrystalline Quartz (SiO2)

sedimentary

Quartz Crystal Cluster

Silicon Dioxide (SiO2)

mineral

Chert (River Pebble)

Microcrystalline quartz (SiO2)

sedimentary

Chert (Jasper variety)

Silicon Dioxide (SiO2)

sedimentary

Chert (specifically Yellow/Brown Chert or Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

sedimentary

Chert (specifically Blue Chert/Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

sedimentary

Granodiorite

Granodiorite (containing Quartz, Plagioclase, Orthoclase, Biotite/Hornblende)

igneous

Chert (Smooth River Pebble)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

sedimentary

Chert (White/Gray variety)

Chert (SiO2)

sedimentary

Brown Jasper

Jasper (a cryptocrystalline variety of Quartz, SiO2)

Mineral, specifically a variety of Quartz

Iron Ore / Ironstone Concretion

Mixture of iron oxide/hydroxide minerals, likely some combination of Hematite (Fe2O3), Goethite (α-FeOOH), and Limonite (a general term for hydrated iron oxides of variable composition) or potentially Bauxite (a mixture of aluminum hydroxides, often with iron oxides, (Al(OH)3) and FeO(OH)). The visual characteristics strongly suggest iron-rich material.

Mineral, specifically an iron ore