Rock Identifier

Category

Biogenic Material

Browse biogenic material specimens identified by the Rock Identifier community.

Learn about Biogenic Material in the encyclopedia

Peat

Diatomite

Dunite

Limonite

Diamond

Peacock Opal

Metarhyolite

Rhodochrosite

Shell Opal

Madagascar Opal

Lavender Obsidian

Electric Blue Obsidian

Diamond (C) — gemstone

Diamond

C

Diamond (or Diamond Simulant) (Carbon (C)) — gemstone

Diamond (or Diamond Simulant)

Carbon (C)

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

Chert (Flint)

Silicon dioxide (SiO2)

Chert (Grey-Green Var.) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Grey-Green Var.)

Silicon Dioxide (SiO2)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Ocean Jasper or Orbicular Jasper (SiO2) — mineral

Ocean Jasper or Orbicular Jasper

SiO2

Diamond (Carbon (C)) — gemstone

Diamond

Carbon (C)

Diamond (Diamond (pure Carbon, C)) — mineral

Diamond

Diamond (pure Carbon, C)

Quartz Vein in Siltstone (SiO2 (Quartz) on clastic sedimentary matrix) — sedimentary

Quartz Vein in Siltstone

SiO2 (Quartz) on clastic sedimentary matrix

Quartz (Iron-stained) (Silicon Dioxide (SiO2)) — mineral

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Diamond (in Jewelry) (Carbon (C)) — mineral

Diamond (in Jewelry)

Carbon (C)

Gastropod Internal Mold (Steinkern) (Class Gastropoda fossil mold (Phylum Mollusca)) — sedimentary

Gastropod Internal Mold (Steinkern)

Class Gastropoda fossil mold (Phylum Mollusca)

Zircon (Zirconium Silicate (ZrSiO₄)) — mineral

Zircon

Zirconium Silicate (ZrSiO₄)

Petrified Wood (Silicified wood (Quartz/Chalcedony replacement of organic matter)) — fossil

Petrified Wood

Silicified wood (Quartz/Chalcedony replacement of organic matter)

Meteorite (Chondrite / Iron-Nickel Meteorite fragment) — meteorite

Meteorite

Chondrite / Iron-Nickel Meteorite fragment

Diamond (Carbon (C)) — gemstone

Diamond

Carbon (C)

Chert (or potentially massive Quartz/Quartzite) (SiO2 (Silicon Dioxide)) — sedimentary (if chert) / metamorphic (if quartzite)

Chert (or potentially massive Quartz/Quartzite)

SiO2 (Silicon Dioxide)

sedimentary (if chert) / metamorphic (if quartzite)

Sandstone (Clastic Sedimentary Rock) — sedimentary

Sandstone

Clastic Sedimentary Rock

Sandstone (Ferruginous) (Arenite (with Iron Oxide)) — sedimentary

Sandstone (Ferruginous)

Arenite (with Iron Oxide)

Possible weathered quartz-rich rock or iron-stained mineral fragment (Indeterminate; possibly quartz (SiO₂) with iron-oxide inclusions) — mineral

Possible weathered quartz-rich rock or iron-stained mineral fragment

Indeterminate; possibly quartz (SiO₂) with iron-oxide inclusions

Peridot (Olivine ((Mg,Fe)2SiO4)) — Mineral

Peridot

Olivine ((Mg,Fe)2SiO4)

Fossil Shark Tooth (Chondrichthyes (Class)) — fossil

Fossil Shark Tooth

Chondrichthyes (Class)

Limestone and Quartz Gravel with Petrified Wood (Sedimentary gravel aggregate and fossilized wood) — sedimentary

Limestone and Quartz Gravel with Petrified Wood

Sedimentary gravel aggregate and fossilized wood

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Black Onyx and Mother of Pearl (Cryptocrystalline Quartz (SiO2) and Nacre (Calcium Carbonate)) — mineral

Black Onyx and Mother of Pearl

Cryptocrystalline Quartz (SiO2) and Nacre (Calcium Carbonate)

Limonite (Iron Ore) (Limonite (FeO(OH)·nH2O)) — mineral

Limonite (Iron Ore)

Limonite (FeO(OH)·nH2O)

Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

Blue Goldstone (Man-made glass with crystalline copper/cobalt inclusions) — mineral

Blue Goldstone

Man-made glass with crystalline copper/cobalt inclusions

Asphalt Concrete (Bituminous conglomerate) — sedimentary

Asphalt Concrete

Bituminous conglomerate

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

Chert / Flint

Microcrystalline Quartz (SiO2)

Fossilized Bone Fragment (Vertebrate Fossil) — fossil

Fossilized Bone Fragment

Vertebrate Fossil

Limonite (Iron Ore) (Limonite (FeO(OH)·nH2O)) — mineral

Limonite (Iron Ore)

Limonite (FeO(OH)·nH2O)

Blue calcite (probable) (Calcite, CaCO₃) — mineral

Blue calcite (probable)

Calcite, CaCO₃

Weathered vesicular stone, possibly pumice or scoria (Vesicular volcanic rock; likely pumice (highly vesicular rhyolitic material) or scoria (basaltic material)) — igneous

Weathered vesicular stone, possibly pumice or scoria

Vesicular volcanic rock; likely pumice (highly vesicular rhyolitic material) or scoria (basaltic material)

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

Chert (Flint)

Silicon Dioxide (SiO2)

Limestone Gravel (Sedimentary Calcium Carbonate (CaCO3)) — sedimentary

Limestone Gravel

Sedimentary Calcium Carbonate (CaCO3)

Flint Pebble (SiO2 (Microcrystalline Quartz / Chalcedony)) — sedimentary

Flint Pebble

SiO2 (Microcrystalline Quartz / Chalcedony)

Green Turban Shell (Polished) (Turbo marmoratus (Aragonite/Calcite)) — mineral

Green Turban Shell (Polished)

Turbo marmoratus (Aragonite/Calcite)

Amber (Succinite) — Mineraloid

Amber

Succinite

Fossilized Gastropod Internal Mold (Steinkern (Mollusca: Gastropoda)) — sedimentary

Fossilized Gastropod Internal Mold

Steinkern (Mollusca: Gastropoda)

Sandstone or Limestone (Sedimentary Rock) — Sedimentary

Sandstone or Limestone

Sedimentary Rock

Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)