Rock Identifier

Category

Organic Mineraloid

Browse organic mineraloid specimens identified by the Rock Identifier community.

Chert (with Limestone matrix) (Chert (Silica: SiO2)) — sedimentary

Chert (with Limestone matrix)

Chert (Silica: SiO2)

Chert (Flint variety) (Microcrystalline context of Quartz (SiO2)) — sedimentary

Chert (Flint variety)

Microcrystalline context of Quartz (SiO2)

Fossilized Shark Tooth (Carcharodon carcharias (fossilized) / Hydroxyapatite permineralized with silica or iron) — sedimentary

Fossilized Shark Tooth

Carcharodon carcharias (fossilized) / Hydroxyapatite permineralized with silica or iron

Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

Black Jasper (Silicon Dioxide (SiO2) with Carbonaceous inclusions) — sedimentary

Black Jasper

Silicon Dioxide (SiO2) with Carbonaceous inclusions

Chert (specifically Flint Arrowhead) (Silicon dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Chert (specifically Flint Arrowhead)

Silicon dioxide (SiO2) - Microcrystalline Quartz

Chert (Jasper/River Stone) (Silicon dioxide (SiO2) - Microcrystalline quartz) — sedimentary

Chert (Jasper/River Stone)

Silicon dioxide (SiO2) - Microcrystalline quartz

Fish Fossil in Limestone (Lycoptera (likely) in Micritic Limestone) — sedimentary

Fish Fossil in Limestone

Lycoptera (likely) in Micritic Limestone

Moss Agate (Silicon Dioxide (SiO2) with inclusions of Manganese or Iron oxide) — mineral

Moss Agate

Silicon Dioxide (SiO2) with inclusions of Manganese or Iron oxide

Tahitian Pearl (Biogenic Calcium Carbonate (Aragonite/Calcite), CaCO3) — mineral

Tahitian Pearl

Biogenic Calcium Carbonate (Aragonite/Calcite), CaCO3

Mother of Pearl (Nacre) (Aragonite (layered with organic polymers), CaCO3) — mineral

Mother of Pearl (Nacre)

Aragonite (layered with organic polymers), CaCO3

Pearl (Organic gemstone (Calcium carbonate - CaCO3)) — mineral

Pearl

Organic gemstone (Calcium carbonate - CaCO3)

Bituminous Coal (Bituminous coal (Organic Sedimentary Rock)) — sedimentary

Bituminous Coal

Bituminous coal (Organic Sedimentary Rock)

Ambergris (Ambergris (Coprolite-adjacent organic substance)) — Organic (Geological interest)

Ambergris

Ambergris (Coprolite-adjacent organic substance)

Organic (Geological interest)

Purple Agate (Dyed Chalcedony) (SiO2 (Silicon Dioxide) with organic dyes) — mineral

Purple Agate (Dyed Chalcedony)

SiO2 (Silicon Dioxide) with organic dyes

Dyed Pink Quartzite (Jadeite Simulant) (Silicon Dioxide (SiO2) with organic dye) — metamorphic

Dyed Pink Quartzite (Jadeite Simulant)

Silicon Dioxide (SiO2) with organic dye

Amber (Succinicum (Organic polymer, largely C10H16O)) — Organic Mineral

Amber

Succinicum (Organic polymer, largely C10H16O)

Organic Mineral

Bituminous Coal (Organic sedimentary rock (humic coal)) — sedimentary

Bituminous Coal

Organic sedimentary rock (humic coal)

Lignite (Brown Coal) (Humic Lignite (Carbonaceous sedimentary rock)) — sedimentary

Lignite (Brown Coal)

Humic Lignite (Carbonaceous sedimentary rock)

Sandstone (Weathered Coastal Boulder) (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone (Weathered Coastal Boulder)

Arenite (composed primarily of SiO2)

Chert (often called Flint) (Chert (Microcrystalline Silicon Dioxide, SiO2)) — sedimentary

Chert (often called Flint)

Chert (Microcrystalline Silicon Dioxide, SiO2)

Petrified Wood (Silicified Wood (primarily SiO2 - Silicon Dioxide)) — sedimentary

Petrified Wood

Silicified Wood (primarily SiO2 - Silicon Dioxide)

Fossiliferous Limestone (Coral Fossil) (Scleractinian Coral in Calcium Carbonate (CaCO3)) — sedimentary

Fossiliferous Limestone (Coral Fossil)

Scleractinian Coral in Calcium Carbonate (CaCO3)

Chert (Jasper variation) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper variation)

Microcrystalline Quartz (SiO2)

Chert (Flint variety) (Microcrystalline or cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Flint variety)

Microcrystalline or cryptocrystalline Quartz (SiO2)

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

Chert (White Chert / Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (and/or River Pebble) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (and/or River Pebble)

Microcrystalline quartz (SiO2)

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

Chert (Jasper)

Microcrystalline Quartz (SiO2)

Yellow Chert (Sedimentary cryptocrystalline quartz (SiO2)) — sedimentary

Yellow Chert

Sedimentary cryptocrystalline quartz (SiO2)

Chert (Jasper/Flint variety) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper/Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (specifically Flint) (Silicon Dioxide (SiO2)) — sedimentary

Chert (specifically Flint)

Silicon Dioxide (SiO2)

Shungite (Non-crystalline carbon (Fullerenes / Carbon-60)) — metamorphic

Shungite

Non-crystalline carbon (Fullerenes / Carbon-60)

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

Chert (Jasper)

Silicon Dioxide (SiO2)

Chert (Arrowhead Debitage or Spall) (Silicon Dioxide (SiO₂)) — sedimentary

Chert (Arrowhead Debitage or Spall)

Silicon Dioxide (SiO₂)

Chert / Chalcedony (Silicon Dioxide (SiO2)) — sedimentary

Chert / Chalcedony

Silicon Dioxide (SiO2)

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

Chert (Basanite / Flint)

Microcrystalline Quartz (SiO2)

Chert (Jasper/Flint variety) (Microcrystalline silicon dioxide (SiO2)) — sedimentary

Chert (Jasper/Flint variety)

Microcrystalline silicon dioxide (SiO2)

Black Mountain Stone (Seiryu Stone) (Limestone with Calcite veins (CaCO3)) — sedimentary

Black Mountain Stone (Seiryu Stone)

Limestone with Calcite veins (CaCO3)

Chert (specifically Flint or Chalcedony nodule) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (specifically Flint or Chalcedony nodule)

Microcrystalline Quartz (SiO2)

Chert / Flint (Chert (Cryptocrystalline Silica, SiO2)) — sedimentary

Chert / Flint

Chert (Cryptocrystalline Silica, SiO2)

Yellow Jasper (Chert) (Silicon Dioxide (SiO2) with iron inclusions) — sedimentary

Yellow Jasper (Chert)

Silicon Dioxide (SiO2) with iron inclusions

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

Chert (Nodule)

Microcrystalline Quartz (SiO2)