Chalcedony in Limestone Host Rock
Silicon Dioxide (SiO2) within Calcium Carbonate (CaCO3)
Mineral within Sedimentary Rock
Category
Sedimentary Like (Industrial Composite)
Browse sedimentary like (industrial composite) specimens identified by the Rock Identifier community.
Learn about Sedimentary Like (Industrial Composite) in the encyclopedia
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Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Freshwater Pearl
Calcium Carbonate (CaCO3) - Aragonite/Calcite organic composite
gemstone
Chert (Arrowhead Fragment)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (River Pebble)
Microcrystalline Quartz (SiO2)
sedimentary
Agate
Silicon Dioxide / Cryptocrystalline Quartz (SiO2)
mineral
Smoky Quartz and Biotite Schist
Quartz-Biotite Schist (SiO2 + K(Mg,Fe)3AlSi3O10(F,OH)2)
metamorphic
Sandstone (Quartz Arenite)
Clastic Sedimentary Rock - Quartz Arenite
sedimentary
Jasper (specifically Red Jasper or Iron-stained Chert)
Silicon dioxide (SiO2) with iron oxide inclusions
sedimentary
Likely black beach pebble
Undetermined; possibly basalt, chert, or dark slate
sedimentary
Quartz Geode
Crystalline Quartz (SiO2) within a sedimentary or volcanic host
mineral
Bauxite
Bauxite (mixture of Hydrous Aluminum Oxides)
sedimentary
Chalcedony (Moonstone variant or White Agate)
Silicon Dioxide (SiO₂)
mineral
Chert (specifically Gray/Blue-Gray Chert)
Chert (SiO2)
sedimentary
Asphalt aggregate (crushed stone in bitumen)
Artificial composite; predominantly crushed granite, basalt, limestone, and/or recycled aggregate bound by bitumen
sedimentary
Ferruginous Sandstone (Ironstone)
Ferruginous Sandstone / Limonite-cemented Quartz Sandstone
sedimentary
Banded Iron Formation (BIF)
Banded Iron Formation (Magnetite-Hematite-Chert)
sedimentary
Orange Calcite with Siderite/Iron Oxide Coating
Calcium Carbonate (CaCO3)
mineral
Anthracite Coal
Anthracite (Carbon C)
metamorphic
Dyed Blue Agate
Silicon Dioxide (SiO2)
Mineral
Iron Ore (Goethite and Hematite)
Iron Oxyhydroxide (α-FeO(OH)) and Iron(III) oxide (Fe2O3)
sedimentary
Botryoidal Chalcedony (Agate)
Silicon Dioxide (SiO2)
mineral
Graywacke
Graywacke
sedimentary
Red Sandstone
Arenite (with Iron Oxide)
sedimentary
Slag (Industrial Glassy Byproduct)
Anthropogenic silicate byproduct (Slag)
Mineral-like byproduct (often mistaken for igneous rock or meteorite)
Brachiopod Fossil in Limestone
Phylum Brachiopoda (likely Order Spiriferida), CaCO3 (Calcite)
sedimentary
Sandstone Cobble with Iron Staining
Arenite with Limonite/Hematite staining
sedimentary
Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Red Chert
Microcrystalline Quartz (SiO2)
sedimentary
Biotite Schist
Biotite-bearing Schist (K(Mg,Fe)3AlSi3O10(F,OH)2)
metamorphic
Mica Schist
Mica Schist (primarily Muscovite and Biotite composition)
metamorphic
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Garnet Schist
Almandine-bearing Mica Schist
metamorphic
Chalcedony
Silicon Dioxide (SiO₂)
mineral
Howlite
Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)
mineral
Red Sandstone
Clastic Sandstone (typically Quartz-rich with Iron Oxide)
sedimentary
Diamond (or Cubic Zirconia)
Carbon (C) or Zirconium Dioxide (ZrO2)
gemstone
Chert (Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Chert (Jasper)
Silicon Dioxide (SiO2)
sedimentary
Ferruginous Sandstone (Gerrit)
Arenite with Iron Oxide cementation
sedimentary