Limestone (specifically Fossiliferous Limestone)
Calcium Carbonate (CaCO3)
Category
Browse sedimentary (chemical) specimens identified by the Rock Identifier community.
Limestone (specifically Fossiliferous Limestone)
Calcium Carbonate (CaCO3)
Sandstone Cobble with Liesegang Rings
Arenite with iron oxide precipitation (SiO2 matrix with Fe2O3 banding)
Quartz (Smoky/Milky variety)
Silicon Dioxide (SiO2)
Chert (Iron-stained)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (specifically Flint or Jasper variant)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (variations include Flint/Jasper)
Cryptocrystalline Quartz (SiO2)
Chert (Beach Pebble)
Microcrystalline Quartz (SiO2)
Limestone
Calcium Carbonate (CaCO3)
Chert (River Stone)
Microcrystalline Quartz (SiO2)
Chert (River Pebble)
Microcrystalline Quartz (SiO2)
Chert (Flint)
Chert (Cryptocrystalline Silicon Dioxide, SiO2)
Chert / Flint
Microcrystalline Quartz (SiO2)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Graphite
Graphite (Native Carbon), Formula: C
Quartz
Silicon Dioxide (SiO2)
Clear Quartz
Silicon dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Chert (concretionary/nodular variant)
Microcrystalline Quartz (SiO2) with possible fossil or mineral inclusions
Chert (with Iron Staining)
Silicon Dioxide (SiO2 / Cryptocrystalline Quartz)
Chert (containing Quartz veins)
Chert (SiO2)
Chert (Iron-Stained)
Silicon Dioxide (SiO2)
Chert (Flint)
Chert (Microcrystalline Quartz, SiO2)
Blue Apatite
Apatite, Ca5(PO4)3(F,Cl,OH)
Chert (Flint) with Limestone Matrix
Silicon Dioxide (SiO2) within Calcium Carbonate (CaCO3)
Chert (Flint/Jasper variety)
Microcrystalline Quartz (SiO2)
Chert (Quartzite Pebble)
Microcrystalline Quartz (SiO2)
Chert (Flint)
Chert (Microcrystalline or cryptocrystalline Quartz, SiO2)
Chert (Yellow Chert/Flint)
Silicon Dioxide (SiO2)
Banded Calcite (often sold as 'Mexican Onyx' or 'Green Onyx')
Calcite (Calcium Carbonate, CaCO3)
Limonitic Iron Ore / Goethite
Hydrated Iron(III) oxide-hydroxide (primarily FeO(OH)·nH2O)
Chert (and/or Chalcedony)
Microcrystalline Silica (SiO2)
Chert (Jasper/Flint variant)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (Yellow Jasper/Flint)
Silicon Dioxide (SiO2)
Red Jasper (Chert)
Silicon dioxide (SiO2) with iron oxide inclusions
Chert (with small quartz inclusion)
Microcrystalline Silica (SiO2)
Chert (Jasper/Agate variety)
Cryptocrystalline Quartz (SiO2)
Chert (Jasper focus)
Silicon dioxide (SiO2) - Microcrystalline Quartz
Chert Fossil (Pebble)
Microcrystalline Quartz (SiO2) with biogenic inclusions
Chert (often called Flint or Jasper)
Silicon Dioxide (SiO2)
Chert (Jasper/Flint variety)
Microcrystalline quartz (SiO2)