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

Concrete (Hydrated Portland Cement Aggregate Composite) — Anthropogenic Sedimentary (Man-made)

Concrete

Hydrated Portland Cement Aggregate Composite

Anthropogenic Sedimentary (Man-made)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Tumbled amethyst (Quartz, purple variety; silicon dioxide (SiO₂), colored mainly by iron impurities and irradiation) — mineral

Tumbled amethyst

Quartz, purple variety; silicon dioxide (SiO₂), colored mainly by iron impurities and irradiation

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

Chert (Jasper/Flint variety)

Silicon Dioxide (SiO2)

Flint / Chert Pebble (Cryptocrystalline quartz (SiO2)) — sedimentary

Flint / Chert Pebble

Cryptocrystalline quartz (SiO2)

Asphalt (Bituminous Pavement) (Bituminous mix (Aggregates with Bitumen binder)) — sedimentary

Asphalt (Bituminous Pavement)

Bituminous mix (Aggregates with Bitumen binder)

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

Flint / Chert

Microcrystalline Quartz (SiO2)

Flint (Microcrystalline quartz (SiO2)) — sedimentary

Flint

Microcrystalline quartz (SiO2)

Sugilite (Sugilite (KNa2(Fe,Mn,Al)2Li3Si12O30)) — mineral

Sugilite

Sugilite (KNa2(Fe,Mn,Al)2Li3Si12O30)

Diamond (Native Carbon (C)) — gemstone

Diamond

Native Carbon (C)

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

Chert (Arrowhead)

Microcrystalline Quartz (SiO2)

Milky Quartz (with potential inclusion) (Silicon Dioxide (SiO2)) — mineral

Milky Quartz (with potential inclusion)

Silicon Dioxide (SiO2)

Petrified Wood (Silicified wood (primarily SiO2)) — sedimentary

Petrified Wood

Silicified wood (primarily SiO2)

Milky Quartz with Iron Staining (Silicon Dioxide (SiO2)) — mineral

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

Petrified Wood (Silicified Wood (primarily Chalcedony or Quartz, SiO2)) — sedimentary

Petrified Wood

Silicified Wood (primarily Chalcedony or Quartz, SiO2)

Goldstone (Aventurine Glass (Man-made glass with copper inclusions)) — mineraloid / man-made glass

Goldstone

Aventurine Glass (Man-made glass with copper inclusions)

mineraloid / man-made glass

Goldstone (Brown/Gold) (Aventurine Glass (Man-made glass with Copper inclusions)) — gemstone

Goldstone (Brown/Gold)

Aventurine Glass (Man-made glass with Copper inclusions)

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

Petrified Wood

Silicified wood (Quartz/Chalcedony replacement)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Ocean Jasper (Orbicular Jasper, Chalcedony (SiO2)) — mineral

Ocean Jasper

Orbicular Jasper, Chalcedony (SiO2)

Milky Quartz (Quartz (Silicon Dioxide, SiO2)) — mineral

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Honey Calcite (Calcite (Calcium Carbonate - CaCO3)) — mineral

Honey Calcite

Calcite (Calcium Carbonate - CaCO3)

Likely weathered metallic mineral or slag fragment (Indeterminate; possibly iron-rich sulfide/oxide material or industrial slag) — mineral

Likely weathered metallic mineral or slag fragment

Indeterminate; possibly iron-rich sulfide/oxide material or industrial slag

Red Sandstone (Arenite (Ferruginous Sandstone)) — sedimentary

Red Sandstone

Arenite (Ferruginous Sandstone)

Sandstone (Sandstone (Siliciclastic Sedimentary Rock)) — sedimentary

Sandstone

Sandstone (Siliciclastic Sedimentary Rock)

Quartz pebble (Silicon dioxide (SiO2)) — mineral

Quartz pebble

Silicon dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Raw Quartz (Silicon Dioxide (SiO2)) — mineral

Raw Quartz

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Quartz pebble (Silicon dioxide (SiO2)) — sedimentary

Quartz pebble

Silicon dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Polished orbicular jasper / brecciated jasper (Jasper, microcrystalline quartz (SiO₂), with iron-oxide and clay-rich inclusions) — sedimentary

Polished orbicular jasper / brecciated jasper

Jasper, microcrystalline quartz (SiO₂), with iron-oxide and clay-rich inclusions

Red Sandstone (Sandstone (Quartz Arenite / Arkose with Hematite cement)) — sedimentary

Red Sandstone

Sandstone (Quartz Arenite / Arkose with Hematite cement)

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

Jasper

Jasper (Silicon Dioxide, SiO2)

Amethyst crystal cluster (Amethyst, purple quartz (SiO₂) colored mainly by iron impurities and irradiation) — mineral

Amethyst crystal cluster

Amethyst, purple quartz (SiO₂) colored mainly by iron impurities and irradiation

Green Aventurine (Quartz (SiO2) with fuchsite inclusions) — mineral

Green Aventurine

Quartz (SiO2) with fuchsite inclusions

Diamond (or Cubic Zirconia / Gemstone Ring) (C (Carbon) for natural Diamond) — gemstone

Diamond (or Cubic Zirconia / Gemstone Ring)

C (Carbon) for natural Diamond

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

Chert (White Chert/Flint)

Microcrystalline Quartz (SiO2)

Diamond (or Cubic Zirconia simulant) (Carbon (C) or Zirconium Dioxide (ZrO2)) — mineral

Diamond (or Cubic Zirconia simulant)

Carbon (C) or Zirconium Dioxide (ZrO2)