Rock Identifier

Category

Organic Structure (Not A Rock)

Browse organic structure (not a rock) specimens identified by the Rock Identifier community.

Learn about Organic Structure (Not A Rock) in the encyclopedia

Bituminous Shale

Bituminous Shale

Black Shale

Oil Shale

Petrified Wood

Crocodile Jasper

Crocodile Jasper

Opalized Wood

Rock Salt

Coral Rock

Rock Gypsum

Asphalt Rock

Calc-Silicate Rock

Calc-Silicate Rock

Talc-carbonate Rock

Talc-carbonate Rock

Chert (Cherty Limestone or Flint) (Microcrystalline Silica (SiO2)) — sedimentary

Chert (Cherty Limestone or Flint)

Microcrystalline Silica (SiO2)

Chert (specifically White Chert or Flint) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (specifically White Chert or Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Jasper (Silicon Dioxide (SiO2)) — sedimentary

Jasper

Silicon Dioxide (SiO2)

Chert (often called Jasper or Flint) (Microcrystalline Silica (SiO2)) — sedimentary

Chert (often called Jasper or Flint)

Microcrystalline Silica (SiO2)

Chert (Flint) (Chert (SiO2)) — sedimentary

Chert (Flint)

Chert (SiO2)

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

Chert (Beach Pebble)

Microcrystalline Quartz (SiO2)

Pearl (Calcium Carbonate (primarily Aragonite and Calcite), CaCO3) — mineral

Pearl

Calcium Carbonate (primarily Aragonite and Calcite), CaCO3

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

Chert (Flint) (Chert (SiO2)) — sedimentary

Chert (Flint)

Chert (SiO2)

Red Sandstone (Clastic Sandstone (typically Quartz-rich with Iron Oxide)) — sedimentary

Red Sandstone

Clastic Sandstone (typically Quartz-rich with Iron Oxide)

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

Chert (Jasper variation)

Silicon Dioxide (SiO2)

Fossiliferous Limestone with Brachiopod shell (Calcium carbonate (CaCO3)) — sedimentary

Fossiliferous Limestone with Brachiopod shell

Calcium carbonate (CaCO3)

Chert (often called Jasper or River Pebble) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (often called Jasper or River Pebble)

Microcrystalline Quartz (SiO2)

Amber (Succinit (C10H16O)) — mineraloid

Amber

Succinit (C10H16O)

Pearl (Calcium Carbonate (CaCO3) + Conchiolin) — mineral

Pearl

Calcium Carbonate (CaCO3) + Conchiolin

Amber (Succinite (Formula: C10H16O)) — Organic Mineraloid

Amber

Succinite (Formula: C10H16O)

Organic Mineraloid

Chert (Jasper/Flint variety) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Jasper/Flint variety)

Silicon Dioxide (SiO2)

Chert (Flint Nodules) (Silicon dioxide (SiO2)) — sedimentary

Chert (Flint Nodules)

Silicon dioxide (SiO2)

Chert (often called Flint or Jasper) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (often called Flint or Jasper)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Jasper/Flint variety) (Silicon dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Chert (Jasper/Flint variety)

Silicon dioxide (SiO2) - Microcrystalline Quartz

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

Chert (often called Flint)

Microcrystalline Quartz (SiO2)

Shale (Laminated Mudstone (Shale)) — sedimentary

Shale

Laminated Mudstone (Shale)

Chert (often called Flint) (Microcrystalline or cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (often called Flint)

Microcrystalline or cryptocrystalline Quartz (SiO2)

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

Chert (Nodule)

Microcrystalline Quartz (SiO2)

Petrified Wood (Silicified Wood (primarily SiO2)) — metamorphic

Petrified Wood

Silicified Wood (primarily SiO2)

Quartz-veined Metamorphic Pebble (Silicate-rich metamorphic rock with quartz veins (SiO2)) — metamorphic

Quartz-veined Metamorphic Pebble

Silicate-rich metamorphic rock with quartz veins (SiO2)

Quartz Geode (Silicon Dioxide (SiO2)) — mineral

Quartz Geode

Silicon Dioxide (SiO2)

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

Chert / River Cobble

Microcrystalline Quartz (SiO2)

Chert (Jasper variation) (Chert (Microcrystalline Silicon Dioxide, SiO2)) — sedimentary

Chert (Jasper variation)

Chert (Microcrystalline Silicon Dioxide, SiO2)

Chert (including Flint and Jasper variants) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (including Flint and Jasper variants)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Banded Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Banded Chert

Microcrystalline Quartz (SiO2)

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Tumbled moss agate (Chalcedony (microcrystalline quartz, SiO₂) with moss-like inclusions) — mineral

Tumbled moss agate

Chalcedony (microcrystalline quartz, SiO₂) with moss-like inclusions

Amber (Succinite (Resinite), C10-H16-O) — mineral

Amber

Succinite (Resinite), C10-H16-O

Green Jasper (Silicon Dioxide (Microcrystalline Quartz, SiO2)) — sedimentary

Green Jasper

Silicon Dioxide (Microcrystalline Quartz, SiO2)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

Chert (often called Flint or Jasper based on color) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (often called Flint or Jasper based on color)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Quartz Geode with Chalcedony (Silicon Dioxide (SiO2) in Geode Form) — sedimentary

Quartz Geode with Chalcedony

Silicon Dioxide (SiO2) in Geode Form

Milky Quartz with Chlorite Schist Inclusions (Quartz (SiO2) with Chlorite Group silicates (typically (Mg,Fe)3(Si,Al)4O10(OH)2)) — metamorphic

Milky Quartz with Chlorite Schist Inclusions

Quartz (SiO2) with Chlorite Group silicates (typically (Mg,Fe)3(Si,Al)4O10(OH)2)

Pyrite (Pyrite (Iron sulfide, FeS₂)) — Mineral

Pyrite

Pyrite (Iron sulfide, FeS₂)

Amber (Succinite (fossilized tree resin)) — mineraloid

Amber

Succinite (fossilized tree resin)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)