Quartzite
Quartzite (primarily SiO2)
metamorphic
Category
Man Made Byproduct (Non Geological)
Browse man made byproduct (non geological) specimens identified by the Rock Identifier community.
Sandstone (Pebble/Cobble)
Arenite (primarily SiO2)
sedimentary
Serpentinite
Serpentinite (a rock composed predominantly of serpentine group minerals)
metamorphic
Selenite
Gypsum (CaSO4·2H2O), specifically the crystalline variety Selenite
Mineral
Agate (specifically, a slice of a Blue Lace or Chalcedony Agate nodule)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Dolomite
Dolomite (CaMg(CO3)2)
Mineral
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Quartz Pebble (Sea Glass-like texture)
Silicon Dioxide (SiO2)
mineral
Basalt
Vesicular Basalt (Mafic volcanic rock)
Igneous
Sandstone
Arenite (SiO2 + various cementing minerals)
sedimentary
Quartzite (River Pebble)
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Quartz (Water-worn Pebble)
Quartz (Silicon Dioxide, SiO2)
mineral
Quartzite (River-worn Shiner)
Quartzite (Formula: SiO2)
metamorphic
Sandstone (Ferruginous)
Arenite with Iron-Oxide Cement
sedimentary
Chert Nodule (River Cobble)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Flower Agate
Chalcedony with Opaque Spherulitic Inclusions (SiO2)
Mineral
Quartz (River Pebble)
Silicon Dioxide (SiO2)
mineral
Quartz Pebble (Citrine-colored or Stained Quartz)
Silicon Dioxide (SiO2)
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite (specifically an iron-stained or Carnelian-colored variety)
Silicon Dioxide (SiO2) with iron oxide inclusions
metamorphic
Ferruginous Quartz
Quartz (Silicon Dioxide) with Iron Inclusion (SiO2 + Fe2O3)
mineral
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Corundum (Sapphire/Ruby in Matrix)
Aluminium oxide (Al2O3)
mineral
Agate (specifically a Blue Agate Geode Slice)
Chalcedony (cryptocrystalline variety of Quartz); SiO2
mineral
Petrified Wood
Silicified Wood (SiO2 - Quartz/Chalcendony replacing organic matter)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
metamorphic
Barite
Barium Sulfate (BaSO4)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Chalk / Sedimentary Limestone
Calcium Carbonate (CaCO3) - Biogenic Sedimentary Rock
sedimentary
Milky Quartz Pebble (Tumbled Quartzite)
Silicon Dioxide (SiO2)
mineral
Jasper (Mookaite style)
Jasper (Silica-rich Microcrystalline Quartz, SiO2)
sedimentary
Siltstone/Sandstone (possibly Wonderstone or Picture Sandstone)
Clastic Sedimentary Rock (primarily SiO2 with Iron Oxide inclusions)
Sedimentary
Carnelian Agate
Silicon Dioxide (SiO2) - variety of Chalcedony
mineral
Selenite (Gypsum Variety)
Hydrous Calcium Sulfate (CaSO4·2H2O)
mineral
Agate (Dyed High-Grade Polished Slice)
Silicon dioxide (SiO2), Chalcedony crystal variety
mineral
Jasper (Imperial Jasper style)
Silicon Dioxide (SiO2) with impurities
sedimentary
Iron Meteorite (likely Chondrite or Iron-Nickel fragment)
Siderite (Iron Meteorite), primarily Fe-Ni (Iron-Nickel) alloy
igneous
Quartzite (River Pebble)
Metamorphosed Quartz-rich Sandstone (SiO2)
metamorphic
Sandstone
Arenite
sedimentary
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral