Chert (Jasper/Flint variety)
Silicon Dioxide (SiO2)
sedimentary
Category
Sedimentary (Fossilized Organic Remain)
Browse sedimentary (fossilized organic remain) specimens identified by the Rock Identifier community.
Learn about Sedimentary (Fossilized Organic Remain) in the encyclopedia
View all →
Chert (Jasper variety)
Microcrystalline Quartz (SiO2)
sedimentary
Chert Nodule
Microcrystalline Quartz (SiO2)
sedimentary
Chert / Flint
Silicon Dioxide (SiO2)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Heart-shaped Limestone
Calcium Carbonate (CaCO3)
sedimentary
Fossilized Coral (Petoskey Stone precursor)
Hexagonaria percarinata (Fossilized Rugose Coral)
fossil
Porphyry
Porphyritic Andesite or Rhyolite
igneous
Porphyritic Basalt
Porphyritic Basalt (containing Plagioclase phenocrysts)
igneous
Apache Tear (Obsidian)
Obsidian (Si02 - Amorphous Silicate)
igneous
Basalt Porphyry
Porphyritic Basalt
igneous
Fulgurite
Fulgurite (Lechatelierite / Vitreous Silica)
mineral
Tree Agate
Silicon Dioxide (SiO2) with Dendritic Inclusions
gemstone
Lepidodendron Fossil (Scale Tree)
Lepidodendron sp.
fossil
Dendritic Quartz
Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions
mineral
Chert (Nodule)
Chert (Silicon Dioxide, SiO2)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Chert Pebble
Microcrystalline Quartz (SiO2)
sedimentary
Chert (River Pebble)
Microcrystalline Quartz (SiO2)
sedimentary
Chert Pebble
Chert (SiO2)
sedimentary
Chert (Jasper/Flint variant)
Silicon Dioxide (SiO2)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Crinoid Stem Fossil
Class Crinoidea (Phylum Echinodermata), primarily Calcium Carbonate (CaCO3)
sedimentary
Coal
Bituminous Coal / Anthracite
sedimentary
Chert (Flint)
Chert (SiO2)
sedimentary
Petoskey Stone
Hexagonaria percarinata
fossil
Coal
Anthracite / Bituminous Coal
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Graphite
Carbon (C)
mineral
Graphite
Graphite (Carbon, C)
mineral
Jasper
Microcrystalline quartz (SiO2)
sedimentary
Bamboo Leaf Jasper
Silicified Siltstone or Jasper (SiO2)
sedimentary
Pegmatite
Igneous Pegmatite (felsic intrusive rock)
igneous
Porphyry (Porphyritic Basalt / Andesite)
Porphyritic Igneous Rock
igneous
Kambaba Jasper (Crocodile Jasper)
Stromatolite Fossil (Silicified Stromatolite / Quartz with Microfossils)
fossil
Chert (Jasper variation)
Chert (Microcrystalline Silicon Dioxide, SiO2)
sedimentary
Fossil crinoid stem segment (columnal)
Crinoidea; commonly preserved as calcite ossicles, often called entrocrinite
fossil
Petoskey Stone
Hexagonaria percarinata
fossil