Rock Identifier

Category

Mineral (Silicate Replaced Organic Material)

Browse mineral (silicate replaced organic material) specimens identified by the Rock Identifier community.

Learn about Mineral (Silicate Replaced Organic Material) in the encyclopedia

Calc-Silicate Rock

Calc-Silicate Rock

Talc

Eltyubyuite

Peat

Paracelsian

Black Shale

Petrified Wood

Banalsite

Hemimorphite

Mica

Shattuckite

Skarn

Fossilized Shark Tooth (Eocene Lamniformes (Mackerel Shark clade)) — fossil

Fossilized Shark Tooth

Eocene Lamniformes (Mackerel Shark clade)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

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

Chert (Jasper-rich)

Silicon Dioxide (SiO2)

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

Chert (Flint)

Cryptocrystalline Quartz (SiO2)

Yellow calcite fragment (Calcite (CaCO₃), likely honey/yellow calcite) — mineral

Yellow calcite fragment

Calcite (CaCO₃), likely honey/yellow calcite

Fossilized Shark Tooth (Chondrichthyes (Class) fossilized tooth) — fossil

Fossilized Shark Tooth

Chondrichthyes (Class) fossilized tooth

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

Petrified Wood

Silicified wood (principally SiO2)

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

Chert (Jasper/Chalcedony)

Microcrystalline Quartz (SiO2)

Petrified Wood (Silicified Wood (SiO2)) — fossil

Petrified Wood

Silicified Wood (SiO2)

Iron-stained quartz-rich rock, possibly jasper or chert (Microcrystalline quartz (SiO₂) with iron oxides/hydroxides) — mineral

Iron-stained quartz-rich rock, possibly jasper or chert

Microcrystalline quartz (SiO₂) with iron oxides/hydroxides

Jasper (Petrified Wood variant) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Jasper (Petrified Wood variant)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Dinosaur Bone (Agatized Dinosaur Bone) — sedimentary/fossil

Dinosaur Bone

Agatized Dinosaur Bone

sedimentary/fossil

Petrified Wood (Silicified Wood (SiO2)) — mineral

Petrified Wood

Silicified Wood (SiO2)

Fossilized Shark Tooth (Chondrichthyes (Class)) — fossil

Fossilized Shark Tooth

Chondrichthyes (Class)

Brecciated Chert (Sedimentary Chert (SiO2) with Calc-Silicate mineralization) — sedimentary

Brecciated Chert

Sedimentary Chert (SiO2) with Calc-Silicate mineralization

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Petrified Wood (Silicified wood (primarily Silicon Dioxide, SiO2)) — metamorphic

Petrified Wood

Silicified wood (primarily Silicon Dioxide, SiO2)

Fancy Jasper (Jasper (Cryptocrystalline Quartz, SiO2)) — sedimentary

Fancy Jasper

Jasper (Cryptocrystalline Quartz, SiO2)

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

Chert (Yellow Jasper/Flint)

Microcrystalline Quartz (SiO2)

Fossilized Shark Tooth (Chondrichthyes (Class)) — fossil

Fossilized Shark Tooth

Chondrichthyes (Class)

Petrified Wood (Agatized/Silicified Wood) (Silicified Wood / Chalcedony (SiO2)) — sedimentary

Petrified Wood (Agatized/Silicified Wood)

Silicified Wood / Chalcedony (SiO2)

Green Jasper (Microcrystalline Quartz (SiO2) with mineral inclusions) — sedimentary

Green Jasper

Microcrystalline Quartz (SiO2) with mineral inclusions

Petrified Wood (Siliconized Wood (SiO2)) — sedimentary

Petrified Wood

Siliconized Wood (SiO2)

Likely petrified wood or silicified fossil fragment (Silicified wood; predominantly microcrystalline quartz (SiO₂)) — fossil

Likely petrified wood or silicified fossil fragment

Silicified wood; predominantly microcrystalline quartz (SiO₂)

Petrified Wood (Silicified wood (Quartz pseudomorph after wood)) — fossil

Petrified Wood

Silicified wood (Quartz pseudomorph after wood)

Shark Tooth Fossil (Carcharodon / Otodus fossilized tooth (Calcium Phosphate / Hydroxyapatite)) — fossil

Shark Tooth Fossil

Carcharodon / Otodus fossilized tooth (Calcium Phosphate / Hydroxyapatite)

Sand Tiger Shark Tooth (Carcharias taurus (fossilized)) — fossil

Sand Tiger Shark Tooth

Carcharias taurus (fossilized)

Petrified Wood (Silicified Wood (SiO2)) — fossil

Petrified Wood

Silicified Wood (SiO2)

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

Petrified Wood

Silicified Wood (primarily SiO2)

Mammoth or Mastodon Tooth Fossil (Proboscidea tooth (Mammuthus or Mammut)) — fossil

Mammoth or Mastodon Tooth Fossil

Proboscidea tooth (Mammuthus or Mammut)

Fossil Shark Tooth (Chondrichthyes tooth fossil) — fossil

Fossil Shark Tooth

Chondrichthyes tooth fossil

Fossil-bearing sedimentary rock, possibly fossil wood or bone (Indeterminate silicified/carbonate fossil in sandstone or mudstone) — fossil

Fossil-bearing sedimentary rock, possibly fossil wood or bone

Indeterminate silicified/carbonate fossil in sandstone or mudstone

Petrified Wood (Silicified Wood (primarily Quartz/Chalcedony, formula SiO2)) — fossil

Petrified Wood

Silicified Wood (primarily Quartz/Chalcedony, formula SiO2)

Red Jasper with Quartz (Microcrystalline Quartz (SiO2)) — sedimentary

Red Jasper with Quartz

Microcrystalline Quartz (SiO2)

Fossil Coral (Phylum Cnidaria / Rugosa or Tabulata) — fossil

Fossil Coral

Phylum Cnidaria / Rugosa or Tabulata

Petrified Wood (Silicified Wood (SiO2)) — fossil

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

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

Petrified Wood

Silicified Wood (primarily SiO2)

Epidosite (Epidosite (Metasomatic calcium-aluminum silicate rock)) — metamorphic

Epidosite

Epidosite (Metasomatic calcium-aluminum silicate rock)

Shark Tooth Fossil (Chondrichthyes (class) fossilized tooth) — fossil

Shark Tooth Fossil

Chondrichthyes (class) fossilized tooth

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)