Chert (Jasper/Quartzite river stone)
Microcrystalline Silicon Dioxide (SiO2)
sedimentary
Category
Sedimentary Rock (Possibly A Conglomerate Or Coarse Grained Sandstone)
Browse sedimentary rock (possibly a conglomerate or coarse grained sandstone) specimens identified by the Rock Identifier community.
Porphyritic Basalt (Chinese Flower Stone / Chrysanthemum Stone basalt variety)
Porphyritic Basalt containing Plagioclase Feldspar phenocrysts
igneous
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Yellow Quartzite (River Cobble)
Quartzite (mainly SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Ironstone (likely siderite or goethite-rich siltstone)
Ferruginous Siltstone
sedimentary
Granitic Gneiss
Gneiss (containing Potassium Feldspar and Quartz)
metamorphic
Porcelain Tile (Sandstone-look)
Man-made Ceramic (resembling Quartz-rich Sandstone)
sedimentary (imitation)
Chert
Chert (variant of microcrystalline quartz)
Sedimentary
Quartz Vein in Host Rock (Likely Slate or Shale)
Hydrothermal Quartz (SiO2) in Pelitic host rock
metamorphic
Quartzite River Rock
Quartzite (primarily SiO2)
metamorphic
Greywacke
Dirty Sandstone (Lithic wacke)
sedimentary
Shale or Slate with Quartz Veins
Shale (fine-grained clastic sedimentary rock) or Slate (low-grade metamorphic rock formed from shale) with Quartz (SiO2) veins
Metamorphic, likely Sedimentary with Quartz veins
Jasper and Quartzite Pebble
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary/metamorphic
Sand Dollar Fossil (Echinoidea)
Class Echinoidea (likely order Clypeasteroida), CaCO3 (Calcite)
sedimentary
Granite
Granite (a felsic intrusive igneous rock composed primarily of quartz, feldspar, and mica)
igneous
Limestone (specifically Grainstone or Micrite)
Calcium Carbonate (CaCO3)
sedimentary
River Quartzite Siltstone
Quartz-rich Meta-siltstone (SiO2 dominated)
metamorphic
Red Quartzite
Quartzite (SiO2)
metamorphic
Fossiliferous Limestone (Coquina / Shell Limestone)
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Orange Quartzite (Tumbled Beach Pebble)
Quartzite (primarily SiO2)
metamorphic
Quartzite Pebble
Quartzite (primarily SiO2)
metamorphic
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Greenstone / Glauconitic Siltstone
Metabasalt or Glauconite-rich Sedimentary Rock
metamorphic or sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Chert
Chert (microcrystalline quartz, SiO2)
sedimentary
Shale or Argillite
Shale (fine-grained clastic sedimentary rock) or Argillite (low-grade metamorphic rock derived from shale)
Sedimentary or Metamorphic (low grade)
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Ironstone Concretion (Pot Stone)
Siderite or Limonite Concretion (FeCO3 or FeO(OH)·nH2O)
sedimentary
Amphibolite
Amphibolite
metamorphic
Red Shale
Fissile Siliciclastic Sedimentary Rock
sedimentary
Quartzite (or Iron-Stained Quartz Pebble)
Silicon Dioxide (SiO2) with Ferric Oxide inclusions
metamorphic
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
Mineral
Red Sandstone
Arenite (with Iron Oxide / Hematite staining)
sedimentary
Quartzite Pebble
Metamorphic Quartz (SiO2)
metamorphic
Limestone
Calcareous sedimentary rock (CaCO3)
sedimentary
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Chalcedony in Host Rock
Chalcedony (SiO2)
mineral
Yellow Quartzite (River Pebble)
Quartzite (primarily SiO2)
metamorphic
Limestone (with potential fossil inclusions)
Calcium Carbonate (CaCO3)
sedimentary
Quartz (likely Clear Quartz or Rock Crystal)
Quartz (SiO2)
Mineral