Chert (Quartz Pebble)
Silicon Dioxide (SiO2)
Category
Browse sedimentary (man made conglomerate) specimens identified by the Rock Identifier community.
Chert (Quartz Pebble)
Silicon Dioxide (SiO2)
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
Dalmatian Stone
Dalmatian Jasper (Aphanitic Igneous Rock with Arfvedsonite inclusions)
Petrified Wood
Silicified Wood (primarily SiO2)
Chert (Nodular or Fossiliferous)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Red Jasper
Silicon Dioxide (SiO2) with Hematite impurities
Chert (Yellow Jasper variant)
Silicon Dioxide (SiO2)
Red Jasper
Jasper (Silicon Dioxide, SiO2)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Chert (Quartz Variety)
Chert (Silicon Dioxide, SiO2)
Petrified Wood
Silicified Wood (primarily SiO2 - Silicon Dioxide)
Petrified Wood
Silicified wood (Quartz/Chalcedony - SiO2)
Septarian Nodule
Septarian Concretion (Calcium Carbonate/Aragonite/Calcite)
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
Ironstone Concretion / Goethite Nodules
Ironstone (composed primarily of Goethite FeO(OH) and Limonite)
Siltstone
Siltstone (primarily composed of SiO2, Al2O3, and phyllosilicates)
Red Ochre (Hematite-rich Clay)
Limonitic/Hematitic Claystone (Fe2O3 with clay minerals)
Yellow Jasper
Chalcedony (SiO2) with goethite or limonite inclusions
Limonite (Iron Ore)
FeO(OH)·nH2O (Hydrated iron(III) oxide-hydroxide)
Quartz (Milky or White Quartz)
Silicon Dioxide (SiO2)
Fluorite
Calcium Fluoride (CaF2)
Red Sandstone
Clastic sedimentary rock (primarily Quartz and Feldspar with Iron Oxide cement)
Red Sandstone
Clastic Sedimentary Mineraloid (predominantly Quartz grains with Iron Oxide cement)
River Stone (likely Mudstone or Siltstone)
Lutite (Clastic sedimentary rock composed of clay and silt-sized particles)
Red Hematite
Iron(III) oxide (Fe2O3)
Ferruginous Sandstone
Sandstone (rich in iron oxides/hydroxides)
Red Jasper (Jasper)
Silicon Dioxide (SiO₂)
Siltstone
Siltstone (primarily composed of microcrystalline Quartz and Feldspar)
Siltstone with Quartz Vein
Siltstone (primarily SiO2, Al2O3, Fe2O3)
Fossil Sand Dollar (Echinoidea)
Phylum Echinodermata, Class Echinoidea (likely Dendraster or Scutella)
Chert (Nodular)
Chert (SiO2 - Microcrystalline Quartz)
Chert / Flint
Cryptocrystalline Quartz (Silicon Dioxide, SiO2)
Fossiliferous Limestone (Chertified Limestone)
Calcium Carbonate (CaCO3) often replaced by Microcrystalline Silica (SiO2)
Chert (Jasper variety)
Silicon Dioxide (SiO2)
Coquina / Fossiliferous Limestone
Fossiliferous Calcarenite (Calcium carbonate, CaCO3)
Echinoid Fossil (Sea Urchin)
Echinoidea (specifically likely Schizaster or similar genus), calcium carbonate (CaCO3)
Anthracite Coal
High-rank coal (primarily Carbon, C)
Amber
Succinite
Quartz / Quartzite
Silicon Dioxide (SiO2)
Limonite (Ironstone)
Limonite (Hydrated iron(III) oxide-hydroxide, FeO(OH)·nH2O)
Red Quartzite
Quartzite (SiO2)
Zebra Jasper
Silicon dioxide (SiO2) with various impurities