Red Jasper
Jasper (Silicon Dioxide, SiO2 with Fe2O3 inclusions)
mineral
Category
Sedimentary Rock (Metamorphosed)
Browse sedimentary rock (metamorphosed) specimens identified by the Rock Identifier community.
Red Sandstone (Old Red Sandstone Pebble)
Arenite with iron oxide (Fe2O3) cement
sedimentary
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Fossiliferous Limestone (Chertified Limestone)
Calcium Carbonate (CaCO3) often replaced by Microcrystalline Silica (SiO2)
sedimentary
Wishing Stone (Graywacke with Quartz Vein)
Graywacke (immature sandstone) with a SiO2 (Quartz) intrusion
sedimentary
Red Sandstone
Arenite (with Iron Oxide)
sedimentary
Chert (Hagstone/Adder Stone)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Septarian Nodule Segment (Turtle Stone)
Septarian Concretion (CaCO3 with Siderite or Calcite infill)
sedimentary
Quartzite (River Pebble)
Metamorphosed sandstone (SiO2)
metamorphic
Turritella Agate
Silicified Elimia tenera Fossil (SiO2)
sedimentary
Polygenetic Breccia
Clastic Breccia (containing lithic fragments in a fine-grained matrix)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Turquoise
Hydrated phosphate of copper and aluminum; CuAl6(PO4)4(OH)8·4H2O
mineral
Gneiss
Gneiss (High-grade regional metamorphic rock)
Metamorphic
Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Turquoise and Hematite
Turquoise (CuAl6(PO4)4(OH)8·4H2O) and Hematite (Fe2O3)
mineral
Mica Schist
Mica Schist (predominantly Muscovite/Biotite)
metamorphic
Greywacke (River Pebble)
Greywacke sandstone with quartz veining
sedimentary
Chert Pebble (with Quartz Vein)
Chert (Cryptocrystalline Silica - SiO2)
sedimentary
Fossiliferous Limestone (Coquina / Shell Limestone)
Bioclastic Limestone (CaCO3)
sedimentary
Quartz Vein with Host Rock (Greywacke/Siltstone)
Silicon Dioxide (SiO2) within Clastic Sedimentary/Metamorphic Matrix
metamorphic
Quartz (Rock Crystal) with minor impurities
Quartz (SiO2)
Mineral
Chert (with Quartz vein)
Chert (Silicon Dioxide, SiO2)
sedimentary
Jasper-Agate Breccia
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Laterite
Lateritic Soil/Rock (rich in Fe2O3 and Al2O3)
sedimentary
Ironstone (with Limonite/Goethite)
Ferruginous Sedimentary Rock (contains Limonite FeO(OH)·nH2O and Hematite Fe2O3)
sedimentary
Schist
Mica Schist (primarily Muscovite or Biotite sheet silicates)
metamorphic
Clear Quartz (or Rock Crystal)
Quartz (SiO₂ - Silicon Dioxide)
Mineral
Clear Quartz (or Rock Crystal)
Quartz (SiO₂)
Mineral
River Stone (Quartzite)
Metamorphosed Sandstone (SiO2)
metamorphic
Gneiss (specifically Biotite Gneiss)
Gneiss (high-grade metamorphic rock primarily composed of Silicates)
metamorphic
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Septarian Nodule
Septarian concretion (Complex mixture of Siderite/Limestone, Calcite, and Aragonite)
sedimentary
Gneiss (with Quartz-Feldspar vein)
Gneiss (high-grade metamorphic rock) containing Quartz (SiO2) and Feldspar (KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8)
metamorphic
Clay (as a rock-forming material)
Clay minerals (e.g., Kaolinite group, Smectite group, Illite group, Chlorite group)
Mineral
Amethyst
Amethyst (Silicon Dioxide, SiO2)
mineral
Carnelian (Red Chalcedony)
Silicon Dioxide (SiO2)
mineral
Carnelian
Carnelian (subset of Chalcedony); SiO2 with Iron Oxide impurities
mineral
Opal
Hydrated Amorphous Silica (SiO2·nH2O)
Mineral
Turquoise
Turquoise (Hydrated phosphate of copper and aluminium) - CuAl6(PO4)4(OH)8·4H2O
mineral
River Stone (likely Siltstone or fine-grained Basalt)
Clastic Sedimentary (Siltstone) or Mafic Igneous (Basalt)
sedimentary or igneous
Granite Gneiss
Gneiss (High-grade regional metamorphic rock)
Metamorphic