Conglomerate
Conglomerate (SiO2 primary clasts with lithic matrix)
sedimentary
Category
Sedimentary (Primary) With Artificial Modification
Browse sedimentary (primary) with artificial modification specimens identified by the Rock Identifier community.
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Hematite
Hematite (Iron(III) oxide, Fe2O3)
mineral
Quartz Geode
Quartz (Silicon Dioxide, SiO2)
Mineral
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
Celestine (Celestite)
Strontium sulfate (SrSO4)
mineral
Smoky Quartz
Quartz (SiO₂)
Mineral
Gravel or Crushed Stone
Fragmented Aggregate Stone
sedimentary or igneous fragment
Yellow Jasper
Silicon Dioxide (SiO2)
sedimentary
Chert (and Jasper blend)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Shale with Vein Infillings
Shale (a fine-grained clastic sedimentary rock). The veins could be Calcite (CaCO3), Quartz (SiO2), or other minerals.
Sedimentary Rock
Quartz (Clear Quartz/Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Hematite / Goethite (Iron Ore)
Iron Oxide (Fe2O3 / FeO(OH))
mineral
Chert (Flint Nodules)
Microcrystalline silica (SiO2)
sedimentary
Chert (Quartz Variety)
Microcrystalline Silica (SiO2)
sedimentary
Chert (containing Flint and Calcareous inclusions)
Silicon Dioxide (SiO2) with Calcium Carbonate (CaCO3) impurities
sedimentary
Chert (with Quartz veins)
Microcrystalline Quartz (SiO2)
sedimentary
Calcite
Calcite (CaCO₃, Calcium Carbonate)
Mineral
Greywacke
Greywacke (Lithofeldspathic Sandstone)
sedimentary
Banded Iron Formation (BIF) / Tiger Iron variety
Banded Iron Formation (predominantly Hematite, Magnetite, and Chert/Quartz - SiO2 + Fe2O3)
sedimentary
Banded Iron Formation (BIF)
Banded Iron Formation (Magnetite/Hematite Chert)
sedimentary
Sandstone (Quartzose)
Arenite (Formula: SiO2 primary, with various cements)
sedimentary
Hematite
Iron(III) oxide (Fe2O3)
mineral
Limestone (Weathered)
Calcium Carbonate (CaCO3)
sedimentary
Sphalerite
Zinc Sulfide (Zn,Fe)S
mineral
White Agate (Chalcedony)
Silicon Dioxide (SiO2)
mineral
Fluorite (likely Green Fluorite variant)
Calcium Fluoride (CaF2)
mineral
Celestite
Celestine (Strontium Sulfate, SrSO4)
mineral
Crushed Limestone
Calcium Carbonate (CaCO3)
Sedimentary
Concrete
Hydrated Portland Cement Aggregate Composite
Anthropogenic Sedimentary (Man-made)
Celestine (or Celestite)
Strontium sulfate (SrSO4)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Botryoidal Hematite
Hematite (Iron(III) oxide, Fe2O3)
mineral
Specular Hematite with Pyrite
Iron Oxide (Fe2O3) with Iron Sulfide (FeS2)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Quartz Geode
Silicon Dioxide (SiO₂)
mineral
Jasper (likely Polychrome or Desert Jasper)
Silicon Dioxide (SiO2) with impurities
sedimentary (chemically precipitated mineral)
Aragonite Star Cluster
Aragonite (Calcium Carbonate - CaCO3)
mineral
Peridot (likely, given the color and bead form)
Olivine, variety Peridot (Mg,Fe)2SiO4
Mineral
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Blue Apatite
Apatite (Ca5(PO4)3(F,Cl,OH))
mineral
Halite (Rock Salt)
Halite (Sodium Chloride, NaCl)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral