Quartzite with Iron Staining
Silicon Dioxide (SiO2) with Fe2O3 impurities
metamorphic
Category
Man Made Rock Like Material
Browse man made rock like material specimens identified by the Rock Identifier community.
Sandstone (likely with Borings or Vesicular Basalt)
Clastic Sedimentary Rock (Sandstone)
sedimentary
Granite (Weathered)
Phaneritic Plutonic Rock (primarily Quartz, Feldspar, and Mica)
igneous
Gneiss
Gneiss (a rock type, not a specific mineral with a formula)
Metamorphic Rock
Sandstone
Clastic Sedimentary Rock (composed mostly of quartz, SiO2)
sedimentary
Carnelian
Chalcedony (cryptocrystalline quartz), SiO2
Mineral
Glacial Erratic (Sandstone/Quartzite)
Glacial Erratic specimen (likely Orthoquartzite or Feldspathic Sandstone)
sedimentary or metamorphic
Quartz
Silicon Dioxide (SiO2)
Mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Granite
Phaneritic Felsic Igneous Rock
igneous
Sandstone
Arenite (general term for sandstone)
Sedimentary Rock
Fluorite (Green Fluorite)
Calcium Fluoride (CaF2)
mineral
Serpentine
Serpentinite (rock) containing serpentine minerals (e.g., Antigorite, Lizardite, Chrysotile)
Metamorphic rock
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Blue Lace Agate
Cryptocrystalline Quartz (SiO2) with trace minerals
sedimentary
Pyrulite (Pyrite / Chalcopyrite)
Iron Sulfide (FeS2) or Copper Iron Sulfide (CuFeS2)
mineral
Cockle Shell (Fossil or Recent)
Class Bivalvia, Family Cardiidae (e.g., Cerastoderma edule for common cockle)
Sedimentary (Biogenic, a type of fossil)
Chert (varieties include Flint and Jasper)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Granite
Granite (felsic intrusive igneous rock)
igneous
Limestone
Calcium Carbonate (CaCO3)
sedimentary
River Rock / Stream Pebble
Fluvial Clast / Rounded Sedimentary Particle
Sedimentary Rock (possibly composed of various minerals)
Jasper / Chert (River Pebble)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Basalt
Basalt (Mafic volcanic rock)
igneous
Basalt
Basalt
igneous
Chert (specifically Iron-stained River Cobble)
Silicon Dioxide (SiO2)
sedimentary
Sandstone (Red Flagstone)
Clastic sedimentary rock (primarily Quartz - SiO2)
sedimentary
Slate
Slate (Regional metamorphic rock composed primarily of quartz, illite, and chlorite)
metamorphic
Crushed Limestone (Gravel)
Calcium Carbonate (CaCO3)
sedimentary
Quartz Geode/Cluster
Quartz (SiO2)
mineral
Turquoise
Hydrated phosphate of copper and aluminium - CuAl6(PO4)4(OH)8·4H2O
mineral
Biotite Schist (likely)
Biotite Schist (rock), Biotite (mineral)
Metamorphic
Basalt
Basalt
igneous
Chert
Chert (variant of microcrystalline quartz)
Sedimentary
Breccia
Breccia (Clastic Sedimentary Rock)
sedimentary
Diorite (Dalmatian Stone)
Phaneritic Plutonic Diorite
igneous
Granite (with alteration)
Granite (Felsic intrusive igneous rock)
igneous
Conglomerate (Puddingstone)
Conglomerate (specifically, clastic sedimentary rock)
Sedimentary
Shale
Shale (fine-grained clastic sedimentary rock)
Sedimentary
Amber
Succinite (Carbon-based organic compound; approximate formula C10H16O)
Mineraloid
Basalt
Mafic Volcanic Rock (composed of Plagioclase Feldspar and Pyroxene)
igneous
Sandstone (likely Quartzose)
Arenite (primarily SiO2)
sedimentary